It's a textbook case

[Sa'ar Chasm]

I have reams of amusing/weird/slightly dirty things my professors have said in class. I published them in the campus paper for lack of better ideas for columns.

Personal favourites:
"It's hard to get a feel for cleavage" - in reference to cleavage planes in crystals, with accompanying hand gestures.

"You can also get cleavage with alcohol" - regarding ability of alcohols to cleave carbon-carbon bonds. The prof saw me snickering from across the room.