I use to think that if you ate your poop it would change colour each time it passed through you, so first time it is brown and then you eat it and it will come out red, then you eat it again and it becomes orange and all like that through the colours of the rainbow. I never did try to prove this theory.
A childhood belief about weeing and pooing

others believed things like this
- when I was little I used to think that white people had pink poop (i am brown so my poop is brown)— helena muteka
- I used to believe that if passed beneath a rainbow I would turn into a woman.— Felipe
- I used to think that unicorn existed and that they do rainbow poop. — Janira duran
- I used to believe that white people had white poop and that mine was brown because I was brownAnon
- Brown or otherwise non-white snow was snowman poop. My kids believe it too!— Dellio
- I used to believe that if you had a pee AND a poop at exactly the same time, then you would die— ange