I love teaching kids. If they're not deliberating who to call in the case of a vampire uprising ("But the fire department can't do anything about vampires!"), they're making innocent slips of the tongue.
We were working on the -ank word ending. I was having them read words off of the board, and this took a nasty turn when we came to "sank." This child couldn't be satisfied with such a straight forward word. Oh, no. He had to add another letter, turning the nice, innocent "sank" into "skank."
As I desperately tried to stifle my giggles (these were second graders, after all, no need to discuss exactly why this word was so funny or what precisely it meant), I moved on. Wouldn't it just so happen that the next word was skin. Oh, joy.
I laughed, and I laughed, and then I changed the subject. Very smooth.