Friendship between women:
A woman didn’t come home one night. She told her husband that she had slept over at a friend’s place. 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. He told his wife that he had slept over at a friend’s place. The woman called his husband’s 10 best friends. Eight confirmed that he had slept over, and two claimed he was still there.