My sister and I had big mouths when we were young - literally. When we were young and innocent, my aunt (a nurse) told us that if we ate rambutan or watermelon seeds, they would take root in our stomachs and grow as trees at the top of our head. We were scarred for life, I tell you.
A childhood belief about watermelons

others believed things like this
- If you eat watermelon seeds a watermelon will grow in your tummy and vines will come out your earsAnon
- when you eat the seeds from a watermelon a watermelon will start to grow inside your stomache.Anon
- I used to think that if i ate watermelon seeds they would grow out of my ears.— Catherine
- i used to believe that if you swallowed the seeds from apples, trees would grow out of your ears!— Scott Davenport
- I used to think that if you ate nuts and seeds that minature trees woudl grow in your stomach.— Gillian
- I used to believe that if you ate a watermelon seed you would grow a watermelon tree in your stomach!!!— Eskimo