Friendship among women:
A woman didn`t come home one night. The next day she told her husband that she had slept over at a girlfried´s house. The man called his wife´s 10 best friends. Not one of them knew anything about it.
Friendship among men:
A man didn´t come home one night. The next day he told his wife that he had slept over at a buddy´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.