I don't think I've ever done more than 5 and even then, I was a bit sore after that. I also found that at that point, my attention had shifted on to other things.
One night a few years ago, I had a motel room to myself. I had a shower & lay on the bed completely naked (after drying myself) & pleasured myself sexually for a few hours. Then went to sleep & the next morning I got horny again & had another few hours of time to masturbate myself on & off before I were due to leave the motel. Nothing like being completely nude & enjoying yourself alone for hours or as long as you can & masturbating / anal play etc.
When I was in college, I had a female friend from high school coming to stay with me. She was a couple of years older so I was nervous about performing well for her. So the day she was set to arrive, I jacked off 5 times with the idea that I would last a long time if my gun wasn't loaded. Unfortunately after several drinks combined with being completely drained, I passed out with her naked next to me. Obviously, I never got the opportunity to explain or redeem myself. Not my best moment!
mine was 7 when I was 13, I was home alone and felt so horny I looked at some porn.i must have been jerking-off for about 6 hours.my cock was aching so much I don't think I jerked-off for 2-3 days.
The most times I did in one day was 12 and was give slam out by the time the day ended...but it was so much fun!