Most Helpful Guy
It depends. Boys dont think of it, because we can't see our sisters that way, but it may be a subconscious thing. Maybe we might prefer someone at that level of attractiveness, because its familiar.
But if the sister is hot, but a bitch, then there is a good chance that they will go for the opposite1THIS IS NOT RELEVANT ANYMORE
Most Helpful Girl
Depends... He might not realise his sister is attractive because its his sister. His sister might be a bitch so he's not into attractive girls.1THIS IS NOT RELEVANT ANYMORE