Grandma Saperstein and Grandpa Rabinowitz are sitting on the veranda
   of the old folks
   home rocking back and forth in their rocking chairs. Grandpa
   Rabinowitz rocks forward in
   his chair and says to Grandma, "Fuck you!"
   Grandma Saperstein rocks forward in her chair and says to Grandpa,
   "Fuck you too!"
   Grandpa becomes very much excited and shouts, "Fuck you!" swinging
   more forward
   again.
   Grandma remains graceful but leans forward and says, "Fuck you again."
   This goes on for about 10 minutes. Finally Grandpa says, "You know
   something,
   Grandma, this oral sex thing ain't all it's cracked up to be."