I used to believe that if you ate a crayon that when you pooped your poop would be colored. This being because my cousin told me she once ate a box of crayons, and when she pooped, it was colored.
To tell you the truth, I'm still not sure about this one. Haha, yeah I'm weird.
A childhood belief about weeing and pooing

others believed things like this
- I used to think that little people in my penis had crayons and colored my pee yellow.— Ryan
- I used to believe that the people who "colored" The Simpsons ran out of skin-toned crayons.Anon
- I'm black, so as a child I used to assume that white people pooped peach the way I pooped brown.— Rick
- I used to think it was true that only ugly girls poop and I thought I was an ugly girl because I poopedAnon
- i thought that when you wet yourself and pooped your pants you would dieAnon
- I believed that chickens pooped eggs (male and female)— WHAT-A-Doodle-WHO??