A man and a woman are married. One day the husband, thinking he's
 being funny, grabs his wife's boobs as she's getting into the
 shower and says to her, "You know, if these were firm, you
 wouldn't need a bra!" and the wife is really angry; it was a rude
 thing to say.
 
 The next day, as she's getting out of the shower, he grabs her ass
 and he says, "You know, if this was firm, you wouldn't need a
 girdle!" Now the wife is really pissed and she's plotting her
 revenge.
 
 So the next day, as her husband is getting out of the shower, she
 grabs his dick and says, "You know, if this was firm I wouldn't
 need your brother!"