Smiling, the Divinations professor entered the boy's bathroom carrying a toothbrush, a tube of tooth cleansing potion, and what could best be described as a flat, clear rectangular object of Muggle invention.

What on earth was that strange fellow up to?

Turning into the sinks, he could see that someone had already turned them on. Either that, or they were busted. No matter. 'Waste not, want not', He thought as he wet his toothbrush aiming to scrub his teeth clean free of the garlic from the pizza he'd enjoyed down in the great hall.