I was just tending to my daily roster when  in storms Professor Low wanting explanations as to why his students are coming back with stories of having sex on the exam table and having things inserted in their butts and liking it. I had to calm him down a bit by explaining what really happens when students come in for extra credit. After telling the professor, I notice a look of curiosity so, I copped a feel on his jeans and noticed he was gettin a little chub there so I offered to demonstrate what goes on. He immediately showed interest by taking his shirt off and showing his fuzzy chest. I removed his jeans and he was wearing a crisp white pair of tighty whities. When I grabbed his package I felt him getting harder and harder! I instantly lubed up a glove and jacked his cock..just when I felt it was right, I stuck my finger up his tight furry asshole. The more I massaged his prostate the more he moaned and groaned with delight until he couldn't hold it any more and popped all over himself with his sticky goo. I think I satisfied his curiosity.