When I was 4, I used to be a huge fan of the Nickelodeon show Rugrats. There's an episode were Angelica tells Chuckie that if he swallows a watermelon seed, it would grow inside him and he would blow up. This scared the crap out of me, so I stayed as far from watermelon as possible. Looking back I realize what a naive little girl I was!
A childhood belief about seeds

others believed things like this
- I used to believe that if you ate a watermelon seed you would grow a watermelon tree in your stomach!!!— Eskimo
- I use to believe (thanks to my Mom) that if I swallowed a watermelon seed a watermelon would grow in my belly.Anon
- when you eat the seeds from a watermelon a watermelon will start to grow inside your stomache.Anon
- If you swallowed a watermelon seed it would grow in your belly— Rachelle
- If you eat watermelon seeds a watermelon will grow in your tummy and vines will come out your earsAnon
- I used to beleive that if you ate a black watermelon seed a tree would grow in your stomach— anonymous