Anecdotal: I don't remember having the slightest concept of sexual interest in anything before puberty.
Anyone got trustworthy better data, go ahead (but we have reason to suspect political interference, which is why I go so far as to cite my own anecdotal memory).
I personally know one girl whom, when she was 8, actively went into sex chat rooms and flirted with older men (anywhere from 16 to 40). I don't think she actually had physical sexual experiences with anyone, though.
I personally know two girls who have had sexual intercourse with adults, one when she was aged 5, the other 8. It was rape in the sense that they were explicitly nonconsentual (they explicitly said didn't want to do it), but it didn't traumatized them. One theory might be that "doing stuff you don't want to do, but adults tell you to do, so...
What do you believe that most people on this site don't?
I'm especially looking for things that you wouldn't even mention if someone wasn't explicitly asking for them. Stuff you're not even comfortable writing under your own name. Making a one-shot account here is very easy, go ahead and do that if you don't want to tarnish your image.
I think a big problem with a "community" dedicated to being less wrong is that it will make people more concerned about APPEARING less wrong. The biggest part of my intellectual journey so far has been the acquisition of new and startling knowledge, and that knowledge doesn't seem likely to turn up here in the conditions that currently exist.
So please, tell me the crazy things you're otherwise afraid to say. I want to know them, because they might be true.