Teacher: “Why did you laugh?”
Boy 1: “I saw a strap of your bra.”
Teacher: “You are punished to stay out of school for one week.”

Boy 2 laughed…
Teacher: “Why did you laugh?”
Boy 2: “I saw your bra straps.”
Teacher: “You are punished to stay out of school for one month.”

Teacher bent down to pickup a chalk. Boy 3 started walking out of the class…
Teacher: “Why are you leaving?”
Boy 3: “I think my school days are over.”