A guy walks into a pub and sees a sign hanging over the bar which read:

Cheese Sandwich: 60 Baht

Chicken Sandwich: 80 Baht

Hand Job: 500 Baht

Checking his wallet for the necessary payment, he walks up to the bar and beckons one of the three exceptionally attractive ladies serving drinks to an eager-looking group of men.

"Yes?" she inquires with a knowing smile, "can I help you?"

"I was wondering", whispers the man, "are you the one who gives the hand-jobs?"

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

The man replies "Well then, wash your hands, I want a cheese sandwich!"