I once got up super horny on a Saturday with nothing to do, so I decided to jerk off all day. With breaks for pissing and eating and twisting, it lasted 12 hours. My whole body shook when I came and the jizz was flying but my prostate really hurt after. I had to come again 1/2 he later just to cum whatever was backed up in me. It was hot, but mostly a mess. At the end I was more exhausted than when I'd have sex.