A young boy enters a barber shop and the barber whispers to his customer, "This is the dumbest kid in the world. Watch while I prove it to you."
A little boy walks into his parents' room to see his mom on top of his dad bouncing up and down. The mom sees her son and quickly dismounts, worried about what her son has seen.
A woman takes a lover home during the day while her husband is at work.
Two engineering students meet on campus one day. The first engineer calls out to the other, "Hey nice bike! Where did you get it?"