I am a single mom of a 4 year old boy. At what age do you start covering up around boys? He may make statements like, "those are your nipples" but doesn't laugh and giggle about it or ask questions. We take showers together occasionally and he will walk in my room in the morning before I get dressed (but in underwear) some days.

He doesn't seem interested/bothered/inquisitive about it. Just wondering what others have done.