It's not so weird when you realise that people generally have different preferences and tolerance for things. There are things you don't necessarily want to mention in front of the opposite sex. There are things the opposite sex may do which doesn't interest you or that might annoy you. I do think that men need other men to help their development, likewise with women. Things like the scouts were great for this. Forcing men and women to mix all the time hasn't been so great, there needs to be some balance to this.