It's been long enough now that I can't remember exactly when I became "not normal." I also dislike debating nature vs. nurture, so for all intents and purposes I just sort of acknowledge in my day-to-day life that I don't approach relationships and sex in the same way other people do, and leave it at that.
For example, today one of my co-workers was talking about overhearing a high school student (male) talking to a friend of his (also male) about how he was going to get his girlfriend to blow him for his birthday. This leads to a conversation on male wish lists. Mostly centered around the idea that back in later elementary school when all the girls got pulled into the gym to learn about our periods, boys were taken into a room and given a list of ultimate sexual fantasies. Honestly, this is still one of my favorite things to imagine about. I've asked Now-hubby about the male version of the, "then you will grow boobies and be ready to make babies!" speech I got in the 4th grade, and it's pretty boring, actually. So I like to pretend that it wasn't, and that the boys actually had to sit through videos full of information like how to tuck boners into the waistband of their pants. The idea of a sexual wish list hand-out is probably one of the better pretend scenarios. (At least in my little group, we all got pamphlets called something stupid like, "Your body, Yourself." I'm pretty sure it was sponsored by Tampax.)
Somehow at the same time that girls are being subtly indoctrinated into what sex acts are "dirty," boys are getting this wish list they can check off of the exact same sex acts. In the latter case they're fantasy, in the former case it's something you only do if he's gotten you a nice piece of jewelry or for an anniversary or something. That's sort of where the conversation went today, and also where the reinforcement came in that respectable girls don't just do up the butt because they've seen it a few times in porn and are curious if it'll feel good for them or not.
I honestly don't know how to react when people say things like, "he asks me for anal every year on his birthday." I mean...is that really something people do? Fucking fascinating.