Every Boyfriend I've Had

I've had 4 serious boyfriends starting when I was 16 with a 19 year old. He was my first. Every boyfriend I've had, all 4 including the current one have wanted to watch me pee, even have me pee on them, or me get peed on by them or any combo of those.

I don't know why it is, but they never knew each other, never talked, I don't allow pics so they can't see them on the internet. What is it that makes every guy I get serious with want to mess with water sports with me?