Smell my finger

So it has been awhile. The school year is in full swing and I am busy.
Too busy it seems to remember that when a male (no matter what age) asks you to smell his finger. DO NOT DO IT!
Here's the senario.
I am sitting on the floor in the classroom tying one of my girls shoes when Evan walks over and sticks his index finger under my nose and says "Miss Jennifer, my finger smells like poopy." (in this please help me get it off kind of voice) Of course I could smell it before he even finished the sentence. I look over at my assistant, who is about to fall out of her chair with laughter, and she tells me he had his hand down his pants, scratching his butt the entire way to me. I grab Evan's hand and low and behold one very brown finger. GAG! AH the fun of teaching preschool!