I somehow got the sport of wrestling mixed-up in my head with the idea of a penis --- I didn't yet know the name of the male sex organ, so I called it a "rassel" because my father, from the deep south of the US, pronounced the name of the sport that caused all the confusion: "rassling". I suppose I was about 6 years old. My older sister straightened me out at some point.
A childhood belief about rude bits

others believed things like this
- We use to think the male organ (penis) was called a PUDDLE....
My twin sister and I both called it that...Anon - I used to believe that the rock thing they used in the sport Curling, was a tea kettle.— Kaninchen
- Some sport cars have a double exhaust. I wondered why. Why would people want to pollute twice as much?— F*ck the environment?
- I'm an American, and for a good long while I thought that Boxing Day involved the sport of boxing.— miss Taken
- a friend of my little sister's had 4 older brothers, so she thought that when you got older you grew a penis!Anon
- When I was little i thought lb for pounds was pronounced lubs, and i called them that for 2 years. Anon