One day, dad caught his little boy swallowing watermelon seeds...
Dad: Son, don't do that. You see the pregnant lady from the neighbor? She swallowed those seeds that was why her tummy got bigger.
Son: I dont want that to happen Dad.
the next day, little boy was playing outside the yard. He saw the pregnant lady. He run and approached her "Hey, I KNOW WHAT YOU'VE BEEN DOING" with a smile on his face.