I always thought that the lyrics were...
one flea, one flea, one flea, one flea pretty...
They were really wonderfully pretty (Cure). I guess it does make more sense!
A childhood belief about misheard lyrics

others believed things like this
- When i was a child, i thought a flea market was where you bought fleas.— Vanessa
- I used to think the Flea Markets actually sold fleas...Anon
- That flea markets sold fleas.— Sarah
- When I first heard the words "flea market", I actually thought it meant "selling fleas".Anon
- I used to believe that a 'Flea Circus' really was a circus with performing feas!— Jo Lancashire
- I used to believe that flea markets were a place people sold fleas, or the place was infested with fleas— Kelley