The father was distressed with his thirteen-year old son’s preoccupation with breasts.
The boy would repeatedly point to attractive girls and whisper: “Hey, Dad, look at the knockers on that one!”
The father finally took the boy to a psychiatrist, who assured him that just one day’s intensive therapy could cure the boy.
When the session was over, father and son walked several blocks to a bus stop. The boy remained silent as they passed a number of pretty girls.
As they boarded the bus, the father was inwardly complimenting the psychiatrist.
Then his son tugged at his sleeve and whispered: “Hey, Dad, look at the ass on the bus driver!”