Since I'm fairly easy to identify, at least over here, I won't go into much detail. But I am curious as to how those of you who have kids, especially teenagers, feel about sleepovers, a friend of the opposite sex sleeping over. At what age do you consider it appropriate, or inappropriate? Would you treat boys and girls differently? Would you expect them to stay in a different room? In which situation or which age would you be ok with them sharing a bed?

This may be quite a personal question, but be as detailed or as general as you like. I'm not expecting us all to agree :-) I'd just like to get some general feedback to think about, really. Thanks in advance.