OK, around the age of 22 I was a junior in college, over my friend mike's place and using his computer to browse the web. I was trying to save a file I found and while browsing his documents folder to find a good place to save it I found a folder full of videos, there was at least 50 of them, all named with numbers (1.mpg, 2.mpg, etc), and a single spreadsheet. I probably shouldn't have been looking through his stuff but I became extremely curious.
The videos were all self recorded, (look like he was holding a camera looking down at himself) of the last few moments of his masturbation, all done in the same format. A few seconds of him pulling his foreskin back and forth over the ridge of his head, ending with him pulling it back all the way, and then holding still as his penis twitched and spit on his desk for three or four seconds then finishing with a bunch of stroking and some hard breathing as the ejaculation completed. His ejaculation in one was long and thin, clear strands. In another his head was completely engorged and a random spray of small white drops was what came out. In another his cum didn't shoot out, but just dribbled forth.
I looked at the spreadsheet and found that it was a catalog. Each video had a series of columns with actual ratings! I had known mike was obsessed with masturbating but this was ridiculous! For each video he had recorded the date, days since last ejaculating, length of time masturbating, the number of shots, and then some ratings from 1 to 5: distance, amount, consistency, color, 'penis arousal', and feeling. Finally, a 'total' column adding them up.
I wanted to get a chance to really investigate some of the videos, i.e. see what his most pleasurable orgasms looked like, but I didn't get a chance.. he had just gotten back from class and I had to close it all down. But I was very excited and I was already cooking up plans to start my own catalog-it sounded like a fun way to masturbate and also learn some things about myself along the way.
there is more to this, I will write later..