I thought a monster would "Come up my bed" (not lurk underneith) and I would be unprepared if I slept with my back to it. For years I could only sleep on one side, as I was sure that the monster wouldn't fit between the bed and the wall, so I could sleep with my back to that side.
A childhood belief about under my bed

others believed things like this
- I was told that if you sleep on your back you swallow your tongue...I have been sleeping on my side ever since— scotty la
- I used to only sleep on my back because I thought I would break my ribs if I slept on my stomach.— Molly
- I thought the boogey monster was a monster that ate boogers at night in front of youAnon
- i used to believe that when you went to sleep you died and then came back to life in the morning— soph
- I Used To Believe The Monster Beverage/Energy Drink Was Monster Milk!— KellGirl
- when I was about 7 I thought that aliens hid under my bed. I wouldn'd sleep in my bed for a whole year!— *Rachel*