Every girl is someone's daughter. And every woman is a sexual being, so every father has to get comfortable with the thought that some other man will stick their dick in his daughter's treasure box at some point. Do you feel like your blood boils at the thought? Calm down, it's only natural... the little angel that your daughter was when she was young has grown up and evolved sexual needs – that's life. So don't be a prick and be happy when your daughter is too, you will always be the one she looks up to.