When I was a kid, I didn't bother spitting out melon seeds, and swallow them instead. When my Aunt caught me at it, she told me that plants will start growing in my stomach. I used to imagine it coming out of my mouth the next morning...
A childhood belief about watermelons

others believed things like this
- My dad always told me never to swallow the pips from apples because trees would start growing in my stomach!!— ALISON W
- my brother told me that if i ride my bike with my mouth open i will swallow my tounge. Anon
- my mom told my sister and I that if you swallow gum, it won't leave ur stomach for 7 years.— Victoria
- I used to think that growing pains meant that a tomato plant was growing in your stomach.— Annette
- dont swallow gum, it will stick to your stomach , your whole life.— nancy
- I used to believe that i couldn't swallow bubble gum because it would stick to my stomach— Nathalia