Riddle: On Mark's 21st birthday he rented a boat and rowed out into the middle of a lake. It had been a tradition that when his dad, grandfather, and great grandfather turned 21, they would walk across the lake to a cabin. But when Mark got out of the boat, he almost drowned. When Mark asked his mom why this had happened, what did she say?
Answer: Mark's mom said, "Your father, grandfather, and great grandfather were all born in January. You were born in July."