I watched a little bit of VH1 Classic this evening with Georgia, we were watching Guns 'n Roses doing a live (at the time) version of "Knockin' on Heavens Door" when she said: "Daddy, I don't think they are really girls, are they?"
Later I blew her mind while we watched Michael and Janet Jackson doing "Scream" by telling her that one was a boy and the other was a girl...