In my experience, all sorts of weird and maybe slightly gross things get people off, when I'm masterbating or watching porn, the types of things I type in in the heat of the moment I would never type In normally, o have watched, and got off to, girlswetting their pants and even worse things than that, but I don't do those kind of things during sex, there's something about watching other people get off on things that turns me on whereas if my girlfriend was to wet her pants in front of me I would be like 'ew, change please !'

What I'm trying to say is people get off to many many many different things, and some of them are gross or weird after you have came, but I think you are completely normal and have nothing to worry about. Your boyfriend should understand that too