Two parents take their son on a 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.
The son 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!

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 just saw daddy talking to the dumbest lady I ever saw and the more and more he talked, the dumber and dumber he got!