Professor

A professor used to speak
naughty things during lecture.
girls decided that next time if he
starts any such thing, they"d leave
the class in protest.

Next day, he startd lecture
smoothly then he suddenly said,
"U know there's shortage of
prostitutes in France?"

Girls looked at each other and
moved towards the door.

He gave a big smile n said:
"sit down,
there is no international flight til
tomorrow"...