Throw away for obvious reasons.

I (18f) was having sex with my friend (19m) last night. I had never orgasmed before and I was on top of him. I told him that I felt like I was going to piss and he told me that it could be an orgasmed building up. I asked what if it's just piss and he told me that whatever happens happens. It ended up being both. It was definitely an orgasm and it felt very intense. It lasted for a pretty long time. I did feel like I was peeing as well, it felt like there was a release of pressure and things were getting really wet and warm. The bad part was that I couldn't get off of him in the moment and for some reason he didn't push me off. He laughed a little and told me that I got a bit too excited. The sheets were very wet and smelled like pee. I apologized and felt embarrassed, he told me it was fine and made a joke about how some men pay good money for experiences like that. He suggested we shower off together and insisted on cleaning the sheets. It seems like he was fine with it, but he had lost his erection after I peed on him and didn't end up cumming.

While I do feel embarrassed, I found the experience weirdly arousing. For some reason, the thought that I peed on him seems really hot to me and the feeling of having pressure build up and release was incredible. I want to experience it again. Do I have a piss kink? Should I bring this up to him?