i used to believe that swallowing an apple or watermelon seed would cause the fruit to grow and grow inside you until your stomach exploded.
A childhood belief about seeds

others believed things like this
- I used to believe that a tree would grow inside you if you ate the seed of an apple or any other fruit!Anon
- My Mom used to tell me if I swallowed an apple seed I would grow an apple tree inside my stomach!— Marg
- I used to believe that if you ate a watermelon seed you would grow a watermelon tree in your stomach!!!— Eskimo
- I used to believe if you ate a seed from a fruit, a tree of that fruit would grow inside you — kels
- I used to think that if I ate a fruit seed it would grow in my stomach if I drink water after thatAnon
- I used to beleive that if you ate a black watermelon seed a tree would grow in your stomach— anonymous