A crusty old biker, with bugs in his teeth, on a summer ride
in the country, walks into a tavern and sees a sign hanging over
the bar which reads:

CHEESEBURGER: $1.50

CHICKEN SANDWICH: $2.50

HAND JOB: $1000.00

Checking his wallet for the necessary payment, he walks up to
the bar and beckons to the exceptionally attractive female
bartender serving drinks to a meager looking group of farmers.

"Yes?" she inquires with a knowing smile, "can I help you?"
"I was wondering," whispers the old biker , "are you the young
lady who gives the hand-jobs?"

"Yes," she purrs, "I am."

The old biker replies, "Well wash your hands, I want a cheeseburger."

I don't get it... explain.

thats a good one