Reggio: I really think this is not a "sensation" thing, she is not old enough to have any sexual sensation, I do believe she is placing her hand in a warm and comfy spot just as a pocket or in their warm hair on their head. I just feel that it is a little dirty especially concidering she wears a diaper, her hand could come out with urine or fecies on it. I do explain to her that her butt is dirty and it is icky to put her hand down there. I dont ridicule her. I do think that children may "explore" as they develope in life and that is for us as parents to handle with our own children. Not sure if I would allow them to have "their way" in a private place and suggest washing up after though. But as I said, that would really be up to a parent to handle with their own child as they choose. When I see a child pick their nose I also inform them they are not to do that at my house, they are welcome to go to the bathroom and blow their nose with tissue and then wash hands. I inform them if they are allowed to at home, that is fine. but not at my house.