A nursery school teacher says to her class, "Who can use the word 'definitely' in a sentence?"

First little girl says, "The sky is definitely blue." The teacher says, "Sorry Amy, but the sky can be grey, or orange depending on the weather."

Second, a little boy says, "Trees are definitely green." "Sorry, but in the autumn many trees are brown or gold," said the teacher.

Little Johnny, from the back of the class, stands up and asks, "Does a fart have lumps?" The teacher looks horrified and says, "Johnny! That's disgusting. Of course not!" "OK... then I have definitely shit in my pants," said Johnny.