Hi, my DD1 does exactly the same thing. I was even going to post a thread about it myself. I have never come across anyone else in the same boat. I don't have much advice except distracting her, which is really hard when they do it in thier bed before they go to sleep. I'm sorry to say that my daughter has been doing it from a very young age and i thought once she was out of nappies she would stop, unfortunately she is nearly 4!!!! However she does seem to be doing it alot less lately. I've just come to the conclusion that she will stop eventually. The only real advice i can give you is what ever you do don't put a name to it, as unfortunately i said once "Stop humping" and its stuck, that is what she's called it ever since, "sorry mummy i was just humping" or "i just want to hump" if you get my drift, not my proudest parenting moment i must say!!!gl