Interesting perspectives here. DD1 is nearly 8 and so far doesn't seem to care about any of us seeing her naked (or seeing us naked). She still baths with her sister sometimes (or has a shower while DD2 is in the bath). If she has friends around for a swim they all happily still pile into the shower afterwards together (and no difference boys or girls yet, although one of her little friends that's a boy has started preferring to leave the girls and get dressed/showered by himself).

I guess the advice to follow their lead is a good one. I prefer not to come into conflict over little things and this would fall into that category.