Teachers!!

A horny young man went to a brothel. The lady at the counter asked him what his choice would be. The man wanted to know what was available.

"On the first floor, we have the ex-models, they are all slinky and sexy. On the second floor, we have our ex-actresses, they are all buxom and beautiful. On the third floor, we have our ex-teachers, they..."

"Say no more! Lead me to the third floor !"

"Are you sure? I'm surprised that you would prefer ex-teachers to ex-models and ex-actresses."

"It's obvious, ma'am... teachers always make you do a thing over and over again, until you're perfect at it !!"