The brothel

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..

Lady - "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..."

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

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

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