This is an oldie but a goodie. A couple of years ago, my friend bought a flyer into work that his wife found hanging at the grammar school where she taught. It was time for the annual science fair, and they had made these flyers to alert the parents:

Looks harmless enough, no?

At first I didn’t understand what was so special about it. Wait–what is that project displayed on the left?

Are there demonstrations available?

YES. “The Mathematics of Cunnilingus.”

Someone obviously did not examine the comic they stole off of the internet before copying and pasting. Or perhaps it was a passive aggressive hint  to their faculty lover. The world may never know…