Maria Bloke sits down in a restaurant and the waiter comes up with the menu. "Good evening , sir, here's the menu." The bloke says "no, I don't want a menu - just bring me a dirty knife from service" The waiter shrugs, goes into the kitchen, fetches a dirty knife and brings it back to the client. He sniffs it very carefully and says: wow. That Beef bourguinon is absolutely perfect, Just the right balance of flavour. I'll have that, please!" The waiter is astonished but goes back to the kitchen and brings out the Beef. Next day the same bloke comes back. Same thing - the menu, but the bloke says "No - just bring me a dirty knife. He sniffs it, smells it, smiles and says "the sole meuniere is delightful, just delightful. I'll have that, please!"So the waiter wanders off and brings him the sole. Next day, same thing, but the waiter decides to screw with the bloke. He goes into the kitchen and says to the dishwasher "Maria, just rub this knife on your privates, will you? "So she does, and the waiter returns to the dining room. The bloke picks up the knife, sniffs it once, frowns at the waiter and says " How long has Maria been working here?