A statue of Venus

The teacher brings a statue of Venus into class and asks, "What do you like best about it, class? Let's start with you, Robert."
"The artwork," says Robert.
"Very good. And you, Peter?"
"Her tits!" says Peter.
"Peter, get out! Go stand in the hall," responds the teacher with disgust. "And you, Johnny?"
"I'm leaving, teacher, I'm leaving..."