Friendship between the sexes   
   
Friendship Between Women:   

A woman didn't come home one night. The next day she told her   
husband that she had slept over at a friend's house. The man   
called his wife's 10 best friends. None of them knew about it.   

Friendship Between Men:   

A man didn't come home one night. The next day he told his   
wife that he had slept over at a friend's house. The woman   
called her husband's 10 best friends. Eight of them confirmed   
that he had slept over, and two claimed that he was still   
there.