My 4 yo DD had a sore and red bum and vulva the other day. When I asked her if anything happened to make it like that she said while playing in the park with a group of kids at the weekend (I was there with other parents at a picnic table but not actively watching everything they were doing) after she went for a wee by a tree, her close friend, a 7-year-old boy “stuffed grass in her bum and vagina” as she put it. I asked her why he did that, she said “I wanted him to cos it was funny”. She doesn’t seem upset about it or anything, just seems to think it’s hilarious. I explained to her (as I have many times before) that those parts are private and no one else is allowed to touch them etc, and also that they’re very sensitive and she shouldn’t put anything in there (and of course especially not allow anyone else to put anything in there) as she could get infections. I made sure to be calm and not like I was blaming her or anything but I feel weird about it because he’s a boy and quite a bit older than her. He’s only 7, I don’t think he had any dodgy intentions or anything but I do think maybe I need to speak to his mum and ensure nothing like this happens again. Am I overreacting? Is this normal childhood behaviour? I don’t really know how to approach it..