...a slut. She gave head to a lot of snakes...if you know what I mean.

Art history professor: ... and this painting is a lesser-known Caravaggio, depicting, on an actual shield, the severed head of...

[Door to lecture hall opens. 20 students walk in and begin making out -- up against walls, on the floor. Clothes are removed, moaning noises heard. This continues for a solid five minutes, interrupted only by the nervous/appreciative laughter of students in the lecture. Finally, kissers exit.]

Professor (not missing a beat):...Medusa, who as we know from the myth of Perseus was...
Class: [Applause]