Three bachelors were kidding Lou, the married man among them.
“You’ve been hitched five years now, Lou, how come you have no children?” asked one of them. Then trying to make a bad pun he added, “is your wife UNBEARABLE?”
“Or,” said another guy, “is she INCONCEIVABLE?”
“Maybe she’s IMPREGNABLE” joked the third man.
“No, boys you’re all wrong,” lamented Lou. “My wife is INSURMOUNTABLE and INSCRUTABLE!”