Female friends and military friends
 

Friendship among women:
A woman doesn't come home at night. The next day she
tells her husband she slept over at a friend's house.
The man calls his wife's 10 best friends. None of them
know about it.

Friendship among men:
A Navy guy doesn't come home at night. The next day he
tells his wife he slept over at a friend's house.
The woman calls her husband's 10 best friends. Eight of
them say he did sleep over and two claim he's still
there.

Ain't it the truth!