My daughter (5) went to a play date the other day in her friend's house (3 weeks younger). They stayed up stairs playing unsupervised all the time because that is the way my friend likes it. When was time to go home I went upstairs to help tidy up and convince daughter to come home when I saw they playing 'ballet dance' which consisted of the other girl holding her crouch area like a man and doing dancing movements and I'm ashamed to admit my daughter was slapping her own bottom and dancing at the same time (she used do this a lot, do less now and we always tell her to stop). Anyway I was disturbed by this dancing and it reminded me how last year when they both were 4, the girl came to sleep over and while they were plying I overheard the girl asking my daughter if she liked to touch herself down there inside the knickers which my daughter replied 'let's do some colouring' or something like that. Is this normal behaviour for this age?