Dumber?

A mother and father take their 6-year old son to a nude beach in
Tampa.
As the boy walks along the sand, he notices that many of the
women have boobs bigger than his mother’s, so he goes back to ask her why. She tells her son, “The bigger they are, the sillier the lady is.” The boy, pleased with the answer, goes to play in the ocean
but returns to tell his mother that many of the men have
larger things than his dad does.
She replies, “The bigger THEY are, the dumber the man is.”
Again satisfied with her answer, the boy goes back to the water.
Shortly thereafter, the boy returns again, and promptly tells
his mother: “Daddy is talking to the silliest lady on the
beach, and the longer he talks, the dumber he gets.”