Have you ever had a crush on a family member?

I always read stuff like the do's and donts of a family reunion and one of them was never try to holler or try to date at a family member. At my last reunion my Dad even asked me " was something going on between you and your cousin" just cuz he was a dude and we hung out a lot to which i replied, i dont even like him as a person but my cuzin did give me those ackward looks. So im woundering if any one had a time where they were or are attracted to a family member.