Grandpa and Grandpa were sitting in their porch rockers watching the beautiful sunset and reminiscing about "the good old days," when Grandma turned to Grandpa and said, "Honey, do you remember when we first started dating and you used to just casually reach over and take my hand?"

Grandpa looked over at her, smiled and obligingly took her aged hand in his.

With a wry little smile, Grandma pressed a little farther, "Honey, do you remember how after we were engaged, you'd sometimes lean over and suddenly kiss me on the cheek?" 

Grandpa leaned slowly toward Grandma and gave her a lingering kiss on her wrinkled cheek.

Growing bolder still, Grandma said, "Honey, do you remember how, after we were first married, you'd kind of nibble on my ear?"

Grandpa slowly got up from his rocker and headed into the house.  Alarmed, Grandma said, "Honey, where are you going?"

Grandpa replied, "To get my teeth!"