Who gets to do the Dirty Dishes?

There's this guy who's in the market for a used motorcycle.
Always wanted a nice big hog. So he's shopping around,
answering ads in the newspaper,and not having much luck. One
day he comes across a beautiful classic harley with a "for
sale" sign on it. Upon inspection, he is amazed to find the
bike in mint condition. He inquires about it with the owner:
"This bike is beautiful!! I'll take it. But you gotta tell me
how you keep it in such good shape."
"Well," says the seller, "it's pretty simple. Just make sure
that if the bike is outside and it's going to rain, rub
vaseline on the chrome. It protects it from the rain. In
fact, since you're buying the bike I won't need my tube of
vaseline anymore. Here, you can have it." and he hands the
buyer a tube of vaseline.
So the guy buys the bike and off he goes, a happy biker. He
takes the bike over to show his girlfriend. She's ecstatic
(being a harley fan). That night, he decides to ride the bike
over to his girlfriend's parents house. See, it's the first
time he's going to meet them and figures it will make a big
impression. When the couple gets to the house, the girlfriend
grabs her boyfriend's arm.
"Honey," she says," I gotta tell you something about my
parents before we go in. When we eat dinner, we don't talk.
In fact, the person who says anything during dinner has to do
the dishes."
"No problem," he says. And in they go. The boyfriend is
astounded. Right smack in the middle of the living room is a
huge stack of dirty dishes. In the family room, a huge stack
of dishes. Piled up the stairs, dirty dishes. In fact,
everywhere he looks, dirty dishes.
They sit down to dinner and, sure enough, no one says a
word. As dinner progresses, the boyfriend decides to take
advantage of the situation. So he reaches over, grabs his
girlfriend, strips her naked, and they make it on the dinner
table. Of course no one says a word.
"Her Mom's gotta good bod...", he thinks. So he grabs his
girlfriend's Mom and ravishes her right there on the dinner
table. Again, no one says a word. Then, the boyfriend notices
it starting to rain, he better take care of the motorcycle.
He pulls the vaseline from his pocket. The father stands up
and shouts:
"All right, I'll do the dishes!!"