I thought in the song "First and Last and Always" by Sisters of Mercy the first line was " I see her body and I dream of the dentist" (instead of the correct "dead days") I figure for some people dreaming of the dentist would be more scary than the dead days!
A childhood belief about misheard lyrics

others believed things like this
- I used to believe they were called dentist disappointments rather than dentist appointments.— Emma
- My parents told me that Jesus visited Santa Claus when he was dead for three days. — Rick Hamell
- I used to believe that a street sign that read "Dead End" meant that there were dead people buried there.Anon
- When I was little, I thought the tooth fairy was a personal friend of my mom since she was a dentist.— Jess
- For some reason until I was about 10 I used to believe that the dentist pierced your ears.— Kendall.XxX
- I used to believe my dentist could give me a shot to straighten my teeth and prevent cavities.— sircigar