A teacher asks her class to use the word 'contagious' in a sentence. Sally, the class genius, raises her hand and says, "Last year I got the mumps, and my mom said it was contagious." "Very good," says the teacher. "Would anyone else like to try?" Little Johnny raises his hand and stands to give his answer. "Our next door neighbor was painting her house by hand, and my dad said it would take the contagious."