Having a big one is not something that I have let rule my life. Really, "shy guy with a big dick" sums me up. I have, and always will prefer to stay under the radar, I don't like attention for being the best, or coming first. i'm not a loser, I just don't need accolades and praise to function in life. Like all stories worth telling it starts with a girl. No doubt not perfect in everyones eyes, Sarah was perfect in mine. We had know each other right through high school and were now at college together. We had maintained a perfectly boring plutonic relationship. Don't get me wrong, I wanted more, she just didn't know it, and I wasn't going to tell her. It was like the worse kept secret, my long time friends knew, infact everyone knew, but she didn't. Well atleast that how she played it, and I figured if she did know and had decided not to do something about it then chances are she didn't like me like that. Making it awkward between us was not an option. Anyway, Sarah and I were at college together, doing a lot of the same courses and both heading towards a degree in Biomechanics. I was doing it because I wanted to teach PE and coach hockey. She was doing it because she was a ranked tennis player, and figured once she had finished up on the professional circuit her tennis credentials and the degree would go well together. This would be a good time to explain what Sarah looks like. She is 5'9", 115lbs, obviously slim and well toned. Her best physical feature is her six pack. Its not not gross and masculine, its toned, faintly outlined, and like the rest of her, perfectly tanned. She is also blessed with what must be the perkiest D cups and butt and legs to die for. She is also very pretty. So anyway back to story. Biomechanics is not just a theory course. Grades are influenced on the physical sides of sport as well. Coordination, strength, agility, skills, and most relevent to this story, body fat percentage. Now don't get me wrong, the other physical aspects are great. I mean helping her train in tennis on a warm summer afternoon, while she wore some short shorts and only a couple of layers of sprts bra was great. I mean her abs tensing as she reached up to serve, her big boobs straining to escape as she came forward to hit a short volley. Its all great stuff. Even doing weights with her in the gym, my personal favourite was spotting her while she did horizontal flys. It doesn't get much better than looking down a girls top while she moves her arms back and forward. But like I said the body fat percentage proved to be the most interesting. It was while we were doing a "personal training" module that it all happened. The class was put in same gender pairs to do a parctical assignment. As luck would have it there was an uneven number of boys and girls so Sarah and myself got to go together. It didn't bother us, we both worked well together, and hung out outside of class anyway so meeting up to work on the assigment was not an issue. We were warned that the assignment was on body fat percentage measurements and would involve us taking measurements off each other while she wore a bikini and I wore my underwear. Not much of an issue considering I had seen her in a bikini a 1000 times and she had seen me in board shorts the same. Besides she had had plenty done before as part of her tennis training. We arranged to catch up the next night at her dorm room as she was going out that night with her dick of a boyfriend, and I was off to meet mates at the local bar for pool and beer. Her boyfriend was a dick, a real arrogant piece of shit. I really didn't like him, he treated me with complete dis-regard. He was your typical jock, at the college on a scholarship for hockey. Infact she had met him through me in a kind of round about way. We both played for the college hockey team, of course he was much better than me and he was the captain. I had taken her along to a team social at the bar. She got drunk and he got her. Better yet he was a talker. Every game in the changing rooms I got to hear about his latest conquest, Sarah, the girl I liked. Even better yet I got to field the questions from her girlfriends about does he have a good body, and most imporantly, does he have a big dick. I wanted tell them no, its really small, mines much bigger. But I didn't, cause, well I honestly didn't know. We were all pretty modest, turning our backs to put on our jocks and we had seperate shower cubicles, so there was no show and tell. Well it was the night of the body fat percentage assignment. Now to calculate body fat percentage there are three different ways, we were using the calliper method. The calliper method involves pinching the skin together and measuring the thickness with callipers. As fat is uniformily distributed over the body, you take measurements from several different places and run them through a formula to come up with an average. I already knew this, I had read it in the class. What I didn't read was where the measurements were taken, that was on the assignment sheet that Sarah had. So I rocked on up to Sarahs, we cracked open a beer and started to discuss the assignment. As she had done it before she was going to measure me first then I was going to measure her. It suited me, atleast I wouldn't get barred up in my boxers. She quickly showed me the diagram of where she would take the measurements and my world stopped for a second. Measurement number seven, 3" below the apex of the crotch on the inside of the leg. Now everyone with a big dick has their own special little way of keeping it discreet. My way, while wearing boxers and board shorts etc is to use a cut-off of pantyhose. I basically wear a 4" ring of pantyhose at the top of my left leg and stuff the end into it. being well prepared I had done this that evening, but at 3" below, she was going to have difficulty getting the calipers in.