Joan and Darby

  Old couple sitting on the sofa
  
  Old woman leans over "Remember when you used to hold
  my hand?" 

  Old man grabs her hand.

  Then she says "Remember when used to put your arm 
  around me?"
  
  Old man puts his arm around her.

  Then she says "Remember when you used to nibble on my
  ear?" 

  Old man gets up, walks away. 

  Old woman - "Where're you going?" 

  Old man - "Dentures."