My adolescent girlfriend and I had a fantasy fetish for buttock injections and playing doctor always involved them but we both feared the real thing, regarding shots in the arm a rite of passage and getting them in the bottom to be childish. When there was a problem with the oral vaccine and we had to get polio shots, therefore, we were afraid of where we would get them. She was a year older than I and got hers first in the arm but worried me by saying that her cousin of exactly my age got his in the bottom, making me fear that the rite of passage lay between her age and mine. When I went for my shot my only concern was where I would get it because all my previous injections had been in the bottom while bending over the lap of a receptionist/medical assistant. That much is true but what follows is what I fantasise could have happened.
I arrived to find the doctor's beautiful teenaged daughter (only slightly older than I) acting receptionist as usual during the school holidays. I desperately craved her respect, which would be lost by the humiliation of bending across her lap for her to see my bare bottom injected. A year earlier I narrowly escaped that abject embarrassment by throwing a tearful tantrum when her father suggested in her presence my "usual shot in the bottom". Having escaped what I feared most (albeit at the expense of my behaviour making me appear even more childish to the girl than I would have bare-bottomed across her lap), I later fantasised about getting the shot the way I feared. Facing her again, this time knowing I had to get a shot, I now regretted that fantasy lest I had tempted fate.
While waiting with her, I asked as calmly as I could, "Polio shots are given in the arm, aren't they?" She initially encouraged me with, "They can be; that's where I got mine," but then worried me by saying the nurse on duty gave them wherever the patient normally got injections. My girlfriend's elder sister arrived and waited outside while the doctor's daughter escorted me into the nurse's room. The nurse asked the girl if I was nervous and the latter accurately replied that I was afraid of where I would get it. The nurse asked where I normally got injections and, before I could reply, the girl said, "Dad always gives them to him in the bottom," and her smile indicated that she wanted to watch me get what she had been deprived of seeing the previous year. When the nurse told me to drop trousers, pull down pants and bend over the girl's lap I wanted to cry and prevented that only by slowly complying with the instruction. When everything was down, I was surprised to experience a certain excitement reminiscent of my earlier fantasy but I still felt acutely embarrassed stretching my nakedness across delightfully mini-skirted bare thighs. The girl simultaneously embarrassed and excited me by sensuously stroking my vulnerable bare bottom as I waited. She opined that waiting was often the worst part and tried to console me with, "be brave, you know you have to get it," adding, "I know how you feel because I used to hate getting shots like this." Her use of the past tense only made me feel more childish. Then I felt the swab and a quick sting where I sit. When the needle came out I was still held in place as the nurse explained that I was almost due for a booster shot, so she would give it to me as long as I was in position. I pleaded either to get it in the arm or return another time for it but to no avail and I promptly felt a brief sting in the other cheek, after which I was finally allowed to get up. Before pulling up pants, I stood before the girl (who had already seen everything before I bent across her lap) gingerly rubbing my sore buttocks and displaying an erection to her amusement.
After dressing and emerging into the waiting room, my girlfriend's sister asked if I had a polio shot and, when I said yes, she asked the dread question where. The doctor's daughter completed my humiliation by saying that I had bent over her lap to get the polio shot in one cheek and a booster shot in the other.
Although getting those shots didn't hurt much, by the time my girlfriend visited me a few hours later I could hardly sit down. She knew I had gone for a polio shot and coyly asked if the site was sore. I gestured to rub my arm but she said that her sister told her where and how I got it and a booster shot. She insisted on seeing where I got them and painfully prodded both sites after pulling down my pants - mocking me that her "little boyfriend" still had to get injections in his bottom.