Ghost Sex

A  professor at the Auburn University was giving a  lecture on Paranormal Studies. 
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 who believe in  ghosts, do any of you think you have 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?'          
About 15  students raise their hand. 
Has anyone  here ever touched a ghost?'    
Three  students raise their hands. 
That's  fantastic. Now let me ask you one question  further...Have any of yo ever made love to a 
ghost?' 
Way in the back, Ahmed raises his hand. 

The professor takes off his  glasses and says 'Son, all the years I've been  giving this lecture, no one has ever claimed to  have made love to a ghost.

You've got to come  up here and tell us about your experience.'  

The Middle Eastern student replied with  a nod and a grin, and began to make his way up to the podium. 

When he reached the front  of the room, the professor asks, 'So, Ahmed,  tell us what it's like to have sex with a ghost?' 

Ahmed replied, "Shit, from back there I thought you said "Goats."