One day, Little Johnny and his mom were going to greet the new neighbor.
"Now Johnny, our neighbor's son was born without ears. Don't say anything or stare at him. Be polite."
"Ok", Johnny said.
The moment the neighbor opened her door, Johnny greeted her, and complimented her home. He saw the woman's baby and asked his name.
"Peter.", The woman said.
"He is so cute. That's is the prettiest baby I have ever seen.", Johnny said.
Johnny's mom was very impressed the whole time they were there. Johnny never said one bad thing the whole time.
Just as they were about to leave, Johnny asked, "Does Peter have good vision?".
"Yes... He does." Peter's mom said. "Why do you ask?".
"Oh... that's good." Johnny said.
"Why is that so 'good' may I ask?", Peter's mom asked.
"Because, if he had to wear glasses, he'd be screwed."