When the All Saints song 'Never Ever' came out, my sister and I loved it and sang along: 'The ceiling won't last that long...' We didn't question that at all. A very long time afterwards it clicked that the line was 'This feeling won't last that long.'
A childhood belief about misheard lyrics

others believed things like this
- I used to think a female daddy-long-legs was called a "mummy-long-legs".Anon
- I thought that 1983 went on for 3 years - had to ask my sister who decided how long a year lasted.— Sally
- We told our little sister that she had a long bushy tail and she fully believed us for ages!!Anon
- I uswed to believe that as long as someone lived to be 100, it was ok and you didn't have to be sad about it.Anon
- I thought the mole on my arm was from a bug pooping on my arm a long time agoAnon
- I used to think that if I stared at the sun for a long time, I could make day turn to night.— Big J