The first time I heard "Nice Girls" by Melissa Manchester, it sounded very clearly like she was singing:
Nice girls (nice girls),
They all gotta potty.
Nice girls (nice girls),
They doo-doo.
The real lyrics (which I was able to look up on a website) are:
Nice girls (nice girls),
Think alot about it.
Nice girls (nice girls),
They do it too.
How I wish I could have misheard it that way much earlier, as a small child. For my sister once told me that having to "doo-doo" is a result of having been naughty, and if you were never naughty, you'd never have to do that.
A childhood belief about misheard lyrics

others believed things like this
- I thought that the difference between girls and boys was that girls have teeth.
Anon - I used to think that teachers were all nice. — name
- That everything was free. You paid for nothing, money was just to look nice.— Blasia M
- i used to believe that if i wasn't nice to my toys, they would fight back.
Anon - When I was 6 I believed that on nice summer days you can see the world spin if you just look hard enough :)Anon
- I used to hear "Everytime you go away, you take a piece of Meat with you"
Makes a nice light snack I spose.— Linda