One day, a kid's mom and dad took him to a nude beach. The kid went to play in the water and came back a little while later and told his mom "I just saw a woman who had bigger things than you do mom." His mom replied "the bigger the woman's boobs the dumber the woman."

So, the boy went out to play again, and came back a little while later and said to his mom "Mom, I just saw a man who has a bigger thing than Dad." His mom replied "The bigger the thing, the dumber the guy."

So the kid went out to play again, then came back and told his mom "Daddy was talking to a woman, and he kept getting dumber and dumber."