I'm not gonna lie I was a bit nervous when the college clinic requested me to come in after classes.  I figured they were gonna drug test me or somethin' so I was sorta relieved when nurse Cindy told me that it was for a voluntary experiment for Dr. Dick. Apparently, he is conducting some kind of experiments in genetic profiling and wanted a sperm sample from me. I was hesitant at first but then nurse Cindy said that it would give me extra credit for one of my mandatory biology classes. So I figure what the heck but, I was still super nervous. I had never really jacked off for someone like that so my pecker was a bit shy. The doc tried to make me feel comfortable and I gave it the old college try and busted in his metallic petri dish.  I think that was one of the weirdest things anyone had asked me to do but at least it'll get my GPA up.