And to answer some of your other questions, porn watching could be considered a fetish. It is a form of voyeurism. Watching other people.

Me personally, I'm not into urination. I don't even like my own pee lol. I see where you're coming from, though, and the whole total abandonment and how that could turn someone on.

About the adult nursing relationship, I could actually see myself doing that! I've never seen that before actually. I was sort of deprived of that as a child (or any physical affection or love from my parents or provided necessity) and there's a void there because of it that that fetish could satisfy.

Some of the time, that's where fetishes come from. A scenario or trauma or situation as a younger person that you're use to or had a taste but deprived of or just plain experienced as a child or adolescent.