Teacher: "Why did you laugh?"

Boy: "I saw a strap of your bra."

Teacher: "Get out! Don't come to class for the next 1 week. Another boy laughs..."

Teacher: "Why did you laugh?"

Boy: "I saw both straps of your bra."

Teacher: "Get out! Don't come to class for next 1 month."

The teacher bends to pick a chalk and little Johnny starts walking out of the class.

Teacher: "Why are you going out?"

Johnny: "With what I saw I think my school days are over."