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. 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, another 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 leans over
and kisses his girlfriend. No one says a word. So
he decides to reach over and fondle her breasts. 
He looks at her parents, but still they keep 
quiet. 

So he stands up, grabs his girlfriend, strips her
naked, and they make love right on the dinner
table. Still, no one says a word. 

"Her Mom's kinda cute", he thinks. So he grabs 
his girlfriend's Mom and has his way with her 
right there on the dinner table. Again, total
silence. 

Then, a few raindrops hit the window and the 
boyfriend realizes it's starting to rain. He 
figures he'd better take care of the motorcycle,
so he pulls the Vaseline from his pocket. 
Suddenly the father stands up and shouts: 
"All right, all right! I'll do the damn dishes."