He asked me to pee on him during sex

Hi yall' so this is probably not a post for the politically correct. If you're easily offended please move on.

My babe and I have an amazing sex life, and it's so much fun!

Today during sex he asked me to pee on him. I asked him if he was serious and he said yes. We were in the back of his truck and he was on top of me so because of said position I couldn't even though I tried.

We laughed liked crazy cuz of course this was very new, weird, and unorthodox for both of us.

I guess this being the first time this came up I'm just wondering if this is something anyone here has ever done or been asked. Is this a weird secret fetish among guys? Or is it totally bananas?

Again, I'm asking people experienced in sex. Don't mean to be patronizing but I don't really need the input of people barely discovering the birds and the bee's.