Two parents

[Fenlander]

Two parents take their son on vacation and go to a nude beach.
The father goes for a walk on the beach and the son goes and
plays in the water. He comes running up to his mom and says,
"Mommy, I saw ladies with boobies a lot bigger than yours!"

The mom says "the bigger they are, the dumber they are." So he
goes back to play. Several minutes later he comes running back
and says, "Mommy, I saw men with dingers a lot bigger than
Daddy's!"

Mom says, "the bigger they are, the dumber they are." So he
goes back to play. Several minutes later he comes running back
and says, "Mommy, I just saw Daddy talking to the dumbest lady
I ever saw and the more and more he talked, the dumber and
dumber he got!"