As I walked to station four, I once again surveyed the gym, looking for any sign of Beth or Ashley. At first I didn't see either of them, but then I finally noticed Ashley. She had just entered the gym from one of the side offices that run along the length of the gym. I'm sure it was her since I got a clear view of her face. She was dressed in the same white shorts and dark blue polo shirt as the other volunteers. As I watched, she turned and began walking away from me, back toward the first registration table that is located inside the gym. She was carrying a manila folder and there was a male student walking with her, wearing only a jockstrap of course. It looked as if she was escorting this student back to the front registration table, since they were walking at the same pace and side by side. I wondered why she was escorting a student like this, since there didn't seem to be any obvious reason for it.

I continued my journey toward station four, taking a few more steps before turning around to see Ashley again. She and her almost-nude male student were now standing at the registration table. As I watched, the girl at the registration table scanned the barcode on the student’s wrist. And just a few seconds after that, the male student left the table and started walking in the direction of the locker room. Meanwhile, Ashley reversed direction and began walking back toward me.

When I saw this, I immediately turned around and decided to quickly finish my journey to station four. Other options briefly flashed through my mind. I thought about waving to her or trying to attract her attention in some way. And I even thought about waiting there until she walked close enough to see me. But then I came to my senses and decided that the best plan was to try to avoid Ashley, as well as Beth if I happened to see her. After all, look at me. I was wearing just a jockstrap and was sporting a pretty good hard-on. Sure, I've known Beth for a long time, but she's never seen me like this! In a bathing suit, sure. Shirtless and in gym shorts playing basketball in the driveway of my parent's house, sure. But never like this. And certainly not with an erection. And although I really like Beth, and could have even fallen for her at one time, now she's really more like an older sister than a girlfriend. And Ashley seems like a sweet enough girl, and she's definitely very cute, but I just met her yesterday. I don't think you go from pizza and drinks to jockstrap and boner in less than a day. Faced with the reality of actually seeing one of them, my new plan was to get through this humiliating situation without being noticed by either one of them.

As I approached station four I saw that Mike was still waiting in line to receive his exam. For some unknown reason, the line at this station was moving more slowly than the others.

"Hey Mike," I said as I walked up behind him.

"Oh, hi Jim," he replied, "I see you finally caught up with me." Mike partially turned his body toward me as he replied.

"Yeah, I'm surprised this is the first time that's happened," I said in reply.

Mike now turned his head to the left to see how the exam was progressing, leaving most of his body still angled toward me. While he was looking away, I took the opportunity to look down and take a quick peek at his condition. I really wanted to know if this exam was as arousing for him as it was for me. But apparently it wasn't. I looked down at the front of his jockstrap but I didn't see any sign of an erection. His package was clearly outlined in the tight material of the pouch, and he might have been chubbed up just a bit, but no erection.

I now joined Mike in watching the exam in front of him that was still in progress, taking a step or two closer to Mike in order to see better. The student was lying flat on the exam table while the male doctor listened to his chest with his stethoscope. At the same time, the male student assistant was checking his blood pressure.

"I watched most of his exam," said Mike as he turned back toward me, "and it looks like this is a cardiac station. They made him do some exercises to increase his heart rate."

"That doesn't sound so bad," I said in reply.

I was now standing directly in front of Mike and had turned to face him during our brief conversation. As it turned out, that was a mistake, since Mike just happened to look down at the front of my jockstrap. In hindsight, I guess that was only fair since I did take a quick peek at him. But my problem was a bit more obvious since I still had a fairly hard, thick and long erection that was barely being contained by the pouch of my jock. At first Mike didn't say anything, he just continued to look down and stare. It was only when I also looked down at myself that Mike spoke.

"It looks like you're really enjoying this, aren't you?" he said jokingly to me.

"Yeah, well, I wouldn't say I'm enjoying it," I replied, "but you know how it is, it just sort of got away from me. And now that I've got it, it just won't go down."

"Don't worry about it, Jim," he said, "I get hard all the time, in fact I'm surprised I've been able to keep it down today walking around like this. And you're not alone, I've seen a few other guys that were hard too."

"Well, thanks for understanding," I said, "I've seen a couple of other guys too, including the guy that's right behind me. It is pretty embarrassing, but hey, it's not like I can really help it. I just don't want anyone to get offended or get the wrong idea, you know?"

"Oh, you didn't offend me at all," he replied, "unless you got that by staring at my bare ass. In that case I might have a problem with it."

"Trust me, Mike, you're not my type," I replied with a half-hearted laugh.

"Well, this station doesn't seem too bad," he said, "but you might want to do something about your boner before you get to station five. Look over there."

As he spoke, he pointed in the direction of the next station. Station five was the dreaded genital and hernia exam. I guess it shouldn't have surprised me to see it, since I knew that sooner or later they'd be checking us in that area. Hell, every exam I've ever had includes a quick hernia check. But this was different. This genital exam was being performed out in the open just like all of the other exam stations. I'm not exactly sure why, but for some strange reason I expected some small amount of privacy for this part of the exam. But there was none.

"Next," said the male assistant at our station.

I turned my attention back to this station and saw that the previous student had left and was on his way to station five. Mike was now walking toward the station to be checked in and examined. After changing the paper on the exam table, the male volunteer had Mike take a seat and then scanned his barcodes. The male doctor began his exam by listening to Mike's heart with his stethoscope. While he was doing this, the student assistant was wrapping a blood pressure cuff around Mike's left arm.

Now that Mike's exam had started, I once again turned my attention toward station five. I could see a male student standing in front of a male doctor. The student was still wearing his jockstrap, so perhaps this wouldn't be so bad after all. Maybe the doctor would just briefly reach into his jock to perform his exam. At least, that's what I was hoping to see. But my hopes were soon dashed to pieces when I saw the student bend over to remove his jockstrap. He was now standing completely nude in front of the male doctor, a female student assistant and anyone else in the gym that cared to watch. I guess they just don't believe in any privacy at all for these exams, even for this most intimate part.

I turned back to see how Mike's exam was going. He was now standing in front of the doctor and his assistant. I couldn't hear what he was saying, but the doctor seemed to be giving Mike instructions. Then as I watched, the doctor and assistant took a few steps away from Mike as he began to do jumping jacks. I've done jumping jacks before, but I've certainly never done them wearing only a jockstrap. I have to say that it was interesting to watch. Each time Mike jumped he assumed a spread-eagle position, simultaneously spreading his feet widely apart and raising his arms high above his head in a wide arc. He would then jump back to the starting position, planting his feet together with his arms lowered to his sides. There was nothing modest at all about this exercise, especially considering his current state of undress. It was as if he was saying "come look at me, I've got nothing to hide, come and watch my jockstrap bounce up and down." After seeing Mike, I wasn't looking forward to this at all.

Mike continued to do jumping jacks, so I once again turned around to look for any further sign of Beth or Ashley. I focused on the area near the side office where I saw Ashley before, but I didn't see any sign of her. But as I was turned in that general direction, I now saw Tom walking toward me from station three, so it looked like my audience would be here in time to see me do the jumping jacks.

I briefly turned back to see how Mike was doing. He finally stopped exercising and was now standing in front of the doctor and his assistant. The doctor was once again listening to his heart with a stethoscope while the assistant was placing a cuff on his arm to check his blood pressure. I could see from the movement of Mike's chest that he was still trying to catch his breath after all of his exercise. I noticed that his chest seemed to glisten with moisture, so it appeared that a few minutes of non-stop jumping jacks was enough for him to quickly work up a sweat. As he stood before the doctor, I noticed that he now seemed to be poured into his jockstrap, as if it was now more snugly clinging to his body. Maybe it was also slightly damp from sweat. That would certainly cause his change in appearance. Or perhaps the exercise simply caused it to be pulled more tightly against the front of his body. Regardless of the reason, Mike's package was now more prominent and visible than ever.

"Hi Jim," I heard Tom say from behind me.

"Oh, hi Tom," I replied. turning toward him. I quickly glanced down and could see that he still had an impressive erection in his jock. If anything it had gotten even thicker. Tom now looked down at me and smiled.

"Nice boner you've got yourself there, Jim," he said. "I saw that you started to get one at the last station, but it looks like it's gotten longer."

"Yeah, well, what can I say," I replied. Really, what was I supposed to say? My, you've got a nice boner there Tom and by the way, how do you like mine?

As I was turned toward Tom, I once again looked at the side office where I previously saw Ashley. This time I saw both of them, Beth and Ashley, coming out of the same side office. They both turned to their left and were walking toward the gym entrance where I first came in. Just like Ashley, Beth was dressed in the standard volunteer uniform. Tom immediately noticed that I was looking at the two girls.

"Do you know those two girls, Jim?" asked Tom.

"Yeah, they're both friends of mine," I replied.

"Oh, bummer," he said, "I don't know about you, but I wouldn't want to be seen like this by anyone that I knew."

"Believe me, I'm totally with you on that," I said in agreement, "and so far I've been able to avoid being seen by them."

"Well, I think you'll be alright," he continued, "it looks like they came out of the room that is used for the research studies. You only need to go in there if you were dumb enough to sign-up for the study and then were unlucky enough to be randomly chosen. They're not working at any of the normal stations so I think you're safe. They're probably just going on a break right now, before their next victim arrives."

My heart sank as I listened to Tom. Little did he know that yes, I was dumb enough to unintentionally sign-up for the study, and yes, I was chosen to participate. If he was right, and he probably was, it meant that Beth and Ashley were working on the study, and that I had an appointment with them in just a few minutes. They would see me like this and there was absolutely nothing that I could do about it. I looked over again at Beth and Ashley. As I continued to watch, they both walked through the far exit of the gym and were now once again out of sight. But since they were now gone, were they just on a break, or were they done for the day? Maybe someone else would take over the study area now.

"Next," said the male assistant.

I turned back toward this station and walked the short distance to the exam table.

"Jim Johnson?", asked the assistant as he read my name from the folder in his hand. I nodded in the affirmative.

"Have a seat on the table," he ordered.

I stepped up to the exam table and sat down on the fresh paper. After scanning the barcode on my folder and my wrist, the assistant held my left hand in order to record my pulse. While he was doing this, the male doctor was reviewing my folder. The assistant now put a blood pressure cuff on my left arm and proceeded to record my pressure. Around the same time he began this, the doctor pressed his stethoscope against the bare flesh of my chest. He didn't ask me to take a deep breath, hold my breath or really to do anything special. He just listened, presumably to my heart.

"Step down please," ordered the doctor as he removed the stethoscope from my chest and his ears. Just a moment prior to this the assistant had finished checking my blood pressure and had remove the cuff from my arm. As ordered, I got up from the exam table and stood before them, and before Tom who was keenly watching my exam. I was once again aware of the erection that I was still sporting. Knowing that I was about to begin several minutes of non-stop exercise, I made a few minor adjustments to my jock, straightening the waist band and adjusting the rear straps. I thought about reaching in and adjusting my erection, but I was afraid that I might make it worse. Right now it was still pointing down and its movement was tightly restricted by my jock. I feared that if I tried to adjust it, it might just pop all the way up and point toward the ceiling. Then I'd have a really noticeable problem. And I really didn't want everyone to see me reach into my jock to adjust myself either.

"We need to check your cardiac response under stress," said the doctor. "So in just a minute, I'll need you to take a few steps away from the exam table, and then begin doing some jumping jacks. Do you know how to do jumping jacks?"

"Yeah, sure," I answered.

"Good," continued the doctor, "you'll need to do them non-stop for about three minutes. When you finish, we'll check your vitals again while you're standing. Then finally, we'll check your rate of recovery while you're resting on the table. Any questions?"

I just shook my head no.

"Good, then you can begin," ordered the doctor.

I took two steps away from the exam table while the doctor and assistant both moved to a position in front of me, but slightly to my sides. I then began the seemingly never ending cycle of jumping jacks. I jumped, spreading my legs far apart and swinging my arms straight up above my head. Then I jumped again, planting my legs back together and swinging my arms down to my sides. Each time I jumped, I felt the package between my legs bounce up and down. I could actually feel the weight of my erect penis bobbing up and down as I jumped, over and over again. The jockstrap certainly helped to contain it, but it was noticeable to me, and was probably noticeable to anyone watching me.

I looked at the doctor, but he was busy making notes in my folder and wasn't watching me at all. I then looked at the male assistant who appeared to be looking down at my crotch. Just then he noticed that I was looking in his direction and looked up at me. He simply smiled at me as our eyes met. I wondered if he smiled because he thought that my predicament was amusing, or did he happen to enjoy looking at the boner in my jock. I guess I'll never know. I then looked out at Tom and could see that he too was enjoying the show that I was putting on for him.

As I continued the jumping jacks I felt the material in the front of my jockstrap being pulled tighter against my body. With each jump I felt the rear straps dig into my bare ass and tug at the bottom of the pouch that was between my legs. I also started to feel a small amount of sweat beginning to appear on parts of my body. I wasn't exactly dripping in sweat, but it was starting to become noticeable under my arms, on my chest and especially in my jock pouch. It was more noticeable in that particular area because, well, that's the only area of my body that was covered in material. And that stretchy, clingy material was in the process of being pulled even tighter against my body each time I jumped. But the good news is that it felt like my erection just might be going down. I couldn't really look down to see right now, but it didn't feel as heavy as before. I was still semi-erect, but maybe, just maybe it would go down before I had to go to station five.

"Ok, you can stop now," said the assistant looking at his watch.

I stopped the exercise and stood before the doctor and his assistant who immediately descended upon me. The doctor pressed his stethoscope to my chest while the assistant checked my blood pressure again. As I stood there, I had time to once again look for any sign of Beth and Ashley. As luck would have it, I happened to see them returning to the gym. They had just entered from the far end of the gym and were walking in my direction. As I watched, they both turned toward the same office at the side of the gym where I saw them before. Once there, they entered the office and were out of my sight. If that really was the study area as Tom said, then there was no doubt now that I was going to see them and not someone else. And they were going to see me.

"Up on the table, Jim, on your back this time," ordered the assistant.

I promptly turned around, stepped up to the exam table and laid down. As I was getting on the table, I took a quick look down at my jock to confirm that my erection was finally subsiding. It wasn't completely gone, but it was much less noticeable now. For one final time, the doctor and assistant checked my vitals, listening to my chest, and checking my blood pressure and pulse.

"Alright, you're all done here," said the doctor. "You can go to the next station now."