it's my life

A nursery school teacher asks her class, "Who can use the word 'definitely' in a sentence?"
The first little girl answers, "The sky is definitely blue," but the teacher says, "Sorry, Amy, but the sky can be gray, or orange, or purple and pink."
A second little boy answers, "Trees are definitely green." The teacher says, "Sorry,Timmy, but in the autumn, the trees are brown."
Little Johnny from the back of the class stands up and asks, "Does a fart have lumps?" The teacher looks horrified and says, "Johnny! Of course not!!!" "OK", says Johnny, "then I have DEFINITELY shit in my pants!"