To get my teeth

An elderly couple lie in bed. The women said: "Remember, when we were
dating you used to kiss me on the cheek." So the man rolls over and
kisses her cheek. Just about asleep when the woman says: "Remember
when you used to nibble on my ear." The man climbs out of bed; and
stomp's out of the bedroom. The woman says: "Honey, where are you
going." The old man says: "To get my teeth."