Considering that, as has been noted elsewhere on this thread, prepubescent children (including infants) self-stimulate their genitals, this seems ... ill-founded. Of course, I suppose it depends how much of the pleasure involves romance, which does seem to be restricted to adults; but I somehow doubt you can claim most of the pleasure from sex is due to romance.
I trust my memory of certain things as far back as a few vaguities before age 2 years, and I've read other people's reports, and I conclude that, while children do self-stimulate, it's typically (but not always) less pleasurable than it is after puberty.
I haven't read any neurological studies addressing that hypothesis in particular, but of course they could exist and I could be unaware of them.
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.