A teacher asks his students to make a sentence with the word "contagious"... ...Sally answers, "Viruses are contagious." "Very good Sally. Anybody else?", the teacher says. Ben puts up his hand, "When I hear someone laugh, I like to laugh as well, because laughter is contagious". "Thankyou Ben, that was a good example", replies the teacher. Then Timmy puts up his hand. "Yes Timmy", asks the teacher. "My neighbour was painting the outside of his house with a two inch brush, and my Dad said that it would take the contagious."