I thought there was a whole house of tiny aliens under my bed, and since they didn't have enough beds, they had to take turns sleeping outside (on the floor by my bed) and that I had to share my blanket with it (the part hanging over the bed.)
A childhood belief about under my bed

others believed things like this
- My Aunt used to tell me that if I didn't share, I would turn into a crow.— Peter
- When I was a kid I used to believe that my perent's were aliens and I was the only human in the house.— Ali
- When I was little, I used to believe I could fly from my bed but I didn"t ....I fell on the floor!Anon
- I used to believe that flowerbeds were beds for flowers.— Nina Green
- i always thought that people always died with their tongue hanging out— Ernesto Shredder
- I don't know where I got this from but for a while I thought that aliens were really God. — Heazure