7) You’re clearly up to no good: You smile at the waiter, and he goes off. He knows you’re a friendly sort — didn’t he always love that about you? — but recently that innocent cordiality seems to antagonize him in ways it never did. Now that he’s having an affair, he knows it’s not so far-fetched that you might, too.
8) No harm in looking, right?: “Did you see our cute neighbor checking out your butt?” she asks with a big smile. “That flight attendant is really your type!” she teases, leaving you wondering what happened to her jealous streak. No mystery. She’s on an affair-fueled, guilt-mitigating mission to casually justify extramarital attractions.