I was having sex with a well endowed guy in his dorm. Easily 10 inches. As he slammed his cock and balls into my hole, I started to piss all over his bed. It got so bad once he started jack hammering me and the entire bed was soaked and he stopped because he said it was disgusting.. Could this be precum or piss?? I defended myself saying it was precum, but he told me he couldn’t get hard anymore and to call it a night. I don’t want to stop meeting up with him, so want to be sure it never happens again.