Grandparents
A couple has been married for about 6 years with 1 child. Ever since they were married they never really had a night out on the town so grandma and grandpa convinced them that it was time, and that they would look after their little boy.

So on Friday night the grandparents came over and the couple went out for dinner and a movie. At 1 am the came home to find their little boy watching TV and the grandparents not there.

Worried, the mother asks, " where are grandma and grandpa?"
The little boy replies "They are in the bedroom."
the mother asked again, "What are they doing in there?"
The little boy tells her "They are eating ice cream."
"And how do you know this?"
The son replies "I was listening at the door and I heard grandma tell grandpa to hurry it up before it goes soft."