Little Johnny and his parents decided to spent the day at the beach. He goes off to play in the sand only to return a few moments later.
“Mom why are some women’s breasts bigger than others?” To which his mom replied.
“The women with bigger breasts are more silly” satisfied with this answer he goes off to play for a while longer.
Later the boy asks why some men’s penises are bigger than others, his mom tells him
“Men with bigger penises are dumber” once again content Johnny goes off to play again.
A while later he returns with a grin on his face and tells his mom,
“Hey Mom Dad is talking to the silliest girl here and he just keeps getting dumber and dumber”