Smelling Wood

A blind man interviews for a job as a quality controller at
the local wood mill. The manager calls the blind man into his
office and asks him how he expects to do this job since he is
blind. The blind man replied he would do it by smell.
The manager decides to test him and places a piece of wood
in front of him.
The manager asks, "What is it without touching it?"
The blind man replies, "That's a good piece of fir."
"Correct," says the manager, "now try this one."
"That's a bad piece of willow," says the blind man.
"Correct," answers the manager. With that, the manager
decides to play a trick on the blind man. He gets his
secretary to lift up her dress and put her crotch in the
blind mans face.
"I'm confused," says the blind man, "Can you turn it
around?"
The secretary turns around and puts her ass in his face.
The blind man says, "Oh, you're trying to fool me! But I
know exactly what kind of wood that is. It's the bathroom
door off a tuna boat!"