A mathematician and a physicist agree to a psychological experiment.

The mathematician is put in a chair in a large empty room and a beautiful naked woman is placed on a bed at the other end of the room.

The psychologist explains, You are to remain in your chair. Every five minutes, I will move your chair to a position halfway between its current location and the woman on the bed.

The mathematician looks at the psychologist in disgust. What? Im not going to go through this. You know Ill never reach the bed! And he gets up and storms out.

The psychologist makes a note on his clipboard and ushers the physicist in.

He explains the situation, and the physicists eyes light up and he starts drooling.

The psychologist is a bit confused. Dont you realize that youll never reach her?

The physicist smiles and replied, Of course! But Ill get close enough for all practical purposes!