I heard once that if you peed on a worm, the worm would exact his revenge by exuding a gas that would make your penis swell up. Fortunately for worms and my karma, I never experimented (probably I was just afraid it would turn out to be true).
A childhood belief about creepy crawlies

others believed things like this
- When I was little I used to believe that the brown potato chips, you know the burnt ones, were worm infested.— Eric Rustman
- i used to think poo was a worm in me that ate leftovers that my tummy didnt want, that was full and left.— vanessa
- My big brother told me that if you peed in the pool, it would turn purple and chase you.— Elizabeth
- my aunt told us there was a special chemical in the pool that would turn red if we peed in it.Anon
- I always thought that the gummy worms were real worms that had been mummified— The Ice Cream Sandwich Monster
- My family told me that if I ate uncooked oatmeal that it would swell up and my stomach would explode.— david