A man comes running to the doctor shouting and screaming in pain. "Please doctor you've got to help me. I've been stung by a bee."
"Don't worry;" says the doctor, "I'll put some cream on it."
"You will never find that bee. It must be miles away by now."
"No, you don't understand!" answers the doctor,
"I'll put some cream on the place you were stung."
"Oh! It happened in the garden in back of my house."
"No, no, no!" says the doctor getting frustrated, "I mean on which part of your body did that bee sting you."
"On my finger!" screamed the man in pain. "The bee stung me on my finger and it really hurts."
"Which one?" the doctor. "How am I supposed to know? All bees look the same to me!"