If you're uncomfortable with it, then mention about wearing shorts. I have a 5 and 8 year old girl and personally I've taught them from a young age the correct word for their body parts, they know what a vagina and a penis is. I've always found it silly to call it anything but what it was. As for barbie's kissing, have none of these kids seen their parents kiss?? It's perfectly normal for them to copy this, it doesn't mean anything sexually necessarily.

I agree that we must teach girls to be modest and respectful but we must also instill in them to appreciate themselves and not be ashamed of their bodies. I just don't see why everyone is getting so uptight about some underwear showing. If actual body parts are visible then she needs better fitting underwear.

If it's around my house who cares? If you're out in public then my girls have been taught not to jump around and go upside down in skirts.