One could say the benefits of working with creatures and living on a farm for an number of years, certains smells weren't as threatening to the nostrils. Not going to clean up? "I'm afraid that's not your call to make." The young Gryffindor didn't realise his own choices were severely limited in these circumstances. No matter. He had more than animal droppings to worry about.

Holding his hand out, "Your wand then Mr. Hirase." Patiently waiting, Professor Thompson's eyebrows lowering for a moment, "and release your nose already, you got time to get accustom to it." After all, holding the nose only made the smell stronger when he chose to release it.