DS is 7, DD is 5. It's much easier to bath them together at the same time, but I'm starting to wonder if it's time to stop it. There is a boy in DS's year who has been accused of behaving inappropriately with the year-younger brother of a classmate, and it's polarised the parents of almost the whole year group. For my part, I believe that probably the conduct happened but was blown out of all proportion - 6 year-old kids exploring themselves with nothing at all sinister attached to it.
I won't go into any more specifics, but it has made me realise DS is growing up, and maybe it's time to start explaining to him that certain parts of our bodies are private. For his part, he has no discomfort whatsoever, no need to keep anything private, and I don't want to engender any unnecessarily by making an issue of this. To my knowledge he is blissfully unaware of the controversy at school, though I know some of the kids are aware and have discussed it with their parents. DS and DD know there are differences between them (of course) and sometimes point them out in the bath (the obvious place), but don't make an issue of it. I want them both to have a healthy relationship with their own bodies.
At what age did you stop bathing DCs together?