A visiting professor at the University is giving a seminar on the

supernatural. To get a  feel for his audience, he asks: "How many people

here believe in ghosts?" About 90 students raise their hands.

"Well that's a good start. Out of those of you who believe in ghosts,

do any of you think you've ever seen a ghost?"   About 40 students

raise their hands.

"That's really good. I'm really glad you take  this seriously. Has

anyone here ever talked to a ghost?  15 students raise their hands.

"That's a great response. Has anyone here ever touched a ghost?"  3

Students raise their hands.

"That's fantastic. But let me ask you one question further... Have any

of you ever made love to a ghost? One student in the back raises his

hand.

The professor is astonished. He takes off his glasses,  takes a step

back, and says, "Son, all the years  I've  been giving this lecture, no

one has ever claimed to have slept with a ghost. You've got to come up

here and tell us about your experience.

The student replies with a nod and begins to make his way up to the

podium. The professor says, "Well, tell us what it's like to have sex

with a ghost.

The student replies, "Ghost?!?" "Dang it, I thought you said 'goats.'