“Can I at least put my jockstrap back on?” I asked.

“No, silly,” answered Ashley as she looked up from the paperwork, “there’s no time for that now. We’re about to start the next study. And Jim, honestly, haven’t you figured out what part of your body we’ll be studying? Its call the Human Sexual Development and Performance study for a reason. We’ll need easy access to all of your fine boy parts, so you need to stay just as you are right now.”

I didn’t respond to her at all as I knew it wouldn’t do any good. I watched as Beth walked to the counter to retrieve another set of paperwork, presumably for the new study, and placed it in my folder. After filling out the top few lines on the form, she closed the folder and handed it to Ashley.

“My turn,” Beth said to Ashley. Apparently it was time for the girls to switch jobs. It looked like Beth was going to perform the hands-on part of this next study.

“OK, Jim,” Beth said, “as Ashley already mentioned, we haven’t personally performed this study on anyone – you’ll be our first subject. So I hope you’ll bear with us as we work our way through the steps. From what we’ve read in the study instructions, the main goal of this study is to test various types of physical stimuli on sexual arousal and performance – in your case, male sexual arousal. Today we’ll be doing just the preliminary screening tests to see if you qualify for the study. If you do, then they’ll notify you as to when and where they need you to appear for the remainder of the study. Understand?”

“Sure, let’s just get on with it.”

“Alright, then to get started, we need you to lay back on the exam table.”

As I laid back on the table, Beth pulled out the metal shelf at the foot of the table to support my feet. She then proceeded to pull on a fresh pair of exam gloves.

“First of all, for the record, how would you describe your current state of arousal? Are you completely flaccid, fully erect, or something in between?”

I lifted my head up slightly from the table to look down at my erection. I wasn’t fully hard, but I wasn’t completely flaccid either.

“I’m somewhere in between.”

“Yes, just looking at you, that’s what I would have said,” replied Beth. “On a one to ten scale, with ten being fully erect, what number would you give yourself right now?”

“Probably a five.” I looked over at Ashley and saw that she was dutifully recording all of my responses in my study folder.

“OK, now, I need to take some baseline measurements before we go any further.”

As she was speaking, she approached me with the same cloth tape measure that they used earlier on my body. Without any hesitation, Beth took ahold of my semi-erect penis with her left hand and wrapped the cloth tape around the very base of my member to record my circumference. She then slid the tape up over the corona of my glans and recorded the measurement there. Finally, she measured the length of my penis from the base to the very tip. Ashley recorded each measurement as it was read.

“Alright, then,” continued Beth, “I need to get you into position for the rest of the study. The instructions say he needs to be in the lithotomy position, right Ashley?”

“Yes, that’s right,” replied Ashley.

“Lithotomy? What does that mean?” I asked.

“Well, Jim,” replied Beth, “it means it’s your lucky day.” As she answered, she pulled out two metal support bars from the end of the exam table. “You get to experience the position that we girls have to endure whenever we see the gynecologist.”

“What?” I cried out. “You’re not putting me in stirrups – no way.”

“Well, you’re actually correct, Jim,” replied Beth. “These are leg supports, not stirrups. There is a difference.” She continued to setup the supports by raising and locking them into place on either side of the exam table. As she did so, the padded leg support on the top of each metal arm came into view.

“You see, your legs go into these and are supported just above your knees,” she said as she patted the cushioned area where my legs would soon be. “And then your feet dangle free.”

“But, why do you need to put me in those?”

She didn’t answer me. Instead, she lifted my left leg and placed it into the elevated brace on the left side of the table. At the same time, Ashley put down my folder of paperwork and did the same thing with my right leg, carefully resting it on the right brace. Once both of my legs were in the supports, Ashley pushed in the metal shelf at the end of the table.

“Now, scoot toward us, Jim,” Beth commanded, “your butt needs to be down here at the edge of the table.”

I reluctantly obeyed Beth’s command by pulling myself toward the edge of the table with my hands. As I did so, my legs slid further across the supports until each one was just above my knee. Now that my legs were supported above my knees, my knees naturally bent and my legs and feet dangled free – just as Beth said they would.

“Good, almost there,” said Beth. “Ashley and I will do the final adjustments.”

As I laid their helpless, Ashley and Beth unlocked the part of the supports that controlled their angle. This allowed them to simultaneously swing my legs out further apart and also raise them higher. This caused my knees to be pushed up closer to my chest and my butt to be partially lifted off of the exam table. With my legs spread widely apart, I was now more exposed than I had been the entire morning.

“There you go,” said Beth as she stood back and admired her work, “I think that should work. What do you think Ashley?”

“I think that should work great,” replied Ashley. “I can see why they said to use this position since it gives us full access to all of his, um, boy parts.” Ashley chuckled as she spoke. “I never thought I’d see a guy in this position. It sure is eye opening. Don’t forget the last part of the positioning instructions, Beth.”

“Oh, that’s right, I almost forgot. Can you get his right side for me?” Beth moved to my left side, took ahold of my wrist and fastened it to the side of the table using a Velcro strap. At the same time, Ashley did the same thing with my right wrist. Once she finished with my wrist, Ashley moved between my parted legs and fastened a Velcro strap around each leg, securing it to the leg support.

“Hey, what the…” I protested.

“I’m sorry, Jim,” said Ashley, “but the instructions make it clear that we’re supposed to always restrain the subjects for this study. They want to make sure that no matter what happens, you don’t take matters into your own hands, so to speak.” Once again Ashley chuckled after she spoke.

“She means you’re not allowed to jerk yourself off during this study,” added Beth. “The study calls for a particular list of stimuli in sequence and they don’t want the results skewed by you masturbating. I’m guessing that since they want you restrained, you’ll have a pretty strong urge to get yourself off by the time we’re done.”

“Great, you’re going to get me all hot and I can’t even do anything about it!”

“Well, at least not right away,” replied Ashley with a slight laugh. “The goal of this study is to measure your state of arousal as the different tests are conducted on you. It’s not for you to ejaculate. So as Beth works through the various tests, you need to hold back. If you feel that you’re about to ejaculate, let us know and we’ll stop immediately. Is that understood?”

“Sure, I guess so.” It’s not like I had a choice in the matter.

Now that I was securely in position, the girls retrieved the equipment and supplies that they would need. Ashley rolled over a small cart that had a laptop and some other equipment on it and positioned it just outside my dangling right leg. At the same time, Beth retrieved a tray and placed it on a shelf just below the laptop. I couldn’t see anything on the tray since it had a cloth drape over it. She removed the covering over the tray, but with my legs in the way, I couldn’t see what was on it.

Beth now picked up an object from the tray and approached me with it, standing right between my parted legs. It looked like a mass of wires, with rounded clamps at the end of several of the wires.

“What’s all of that?” I asked.

“It’s a type of sensor called a Penile Plethysmograph, or just PPG. Once I attach it to you and connect it to this laptop, it will continuously measure even the slightest change in the size of your penis. Basically, when the blood flow to your penis changes due to your state of arousal, we’ll know about.”

“Sounds wonderful,” I said, “does it hurt?”

“No, it shouldn’t, otherwise we would never be able to get an accurate reading,” Beth answered. As we were talking, she began to attach the device to my penis. She position one of the metal clamps around the base of my penis and another near the head. A third sensor was placed around the middle part of my penis. This last one wasn’t a metal clamp like the others, it looked more like a simple wire loop that went all the way around and was then pulled tight against my member. At the same time, Ashley was attaching the other end of the wires to a small metal device that was sitting next to the laptop. She then plugged that device into the USB port of the laptop.

“Alright, Ashley,” said Beth, “my end is all connected. Crank up the monitoring software and let’s see what we get.” Beth now hovered over Ashley’s shoulder as both girls briefly watched the laptop screen to verify that everything was operating correctly.

“Just remain still for a moment, Jim,” ordered Ashley, “we need to get our baseline measurements.”

I laid there motionless while this strange electronic device measured the thickness of my dick! After a few more seconds, Beth retrieved something from the shelf under the laptop and approached me with it.

“OK, Jim,” Beth said, “I need to attach this now, and from what Mandy tells me, you know exactly how it works.” She held up a leather cock strap and then immediately began to attach it to me.

“But, I don’t know…” I tried to stammer in reply. I lied. I knew exactly what it was and how it was used since Mandy bought me one about a year ago as a gift. She said she liked the way it pulled my balls up nice and tight and how it made me feel even thicker to her when we made love.

“Oh, come on, Jim, didn’t you know that Mandy and I share lots of secrets? She told me that she bought a cock strap for you, a leather one just like this. She even told me how much she enjoys it when you put it on for her. I guess my little sister has a slightly kinky side to her.”

As she was speaking, she positioned the strap behind my testicles and then pulled it up tightly around the base of my penis. She now fastened the strap securely in place using the snaps that were provided. I could feel the additional tightness of the skin near the base of my penis, as well as the skin of my scrotum. With the strap in place, my testicles were pulled forward and lifted away from my body, with the normally loose skin of my scrotum pulled tightly against them.

“There you go, Jim,” said Beth, “you’re all nice and tight now. The study instructions say that this slows down the exit of blood from your penis, and it also helps prevent some guys from ejaculating too quickly.”

I didn’t respond to her at all. But I did look up and see that both Beth and Ashley were staring down at their latest handiwork and smiling.

“Ashley, let’s give him about 30 seconds to stabilize and then go ahead and record the results,” said Beth. I saw Ashley node in agreement. The two young women hovered over the laptop screen once again, watching as the changes in my penis size were being recorded.