Hi,

My son (5) told me that he and his best friend (6) play with each others penises. Going so far as his best friend likes to put his head on my son's naked penis...
It seems to be always initiated by the friend and apparently he really likes to see my son's penis.

I don't think this is appropriate for them. I've told my son that his penis is private and it's not appropriate for other people to ask to see it or play with it. He seems to get this and doesn't get it out all the time like he used to when he was little and tries to avoid other people seeing it when getting changed. But things are different with his friend and the play seems to be escalating.

I don't know what to do. I'm concerned if I say he's not allowed to do this, then maybe they'll do it anyway but he won't tell me about it.
I don't want to break off the friendship, they are fantastic for each other (except in this respect) and we live next door.
I guess I should talk to the friend's parents about it and see if they know and if it has been an issue before.

Does anyone have any ideas on how to put a stop to this? Or at least reign it in?