Back when I was growing up, it used to get a LOT colder during the winter, and thus my mother would go out and start the car and let it warm up for 10-15 minutes. I asked her why no-one stole the car during the winter. Her response - thieves don't steal cars during the winter. For years I was convinced that car thieves took the winter off.
A childhood belief about criminals

others believed things like this
- I used to believe that when winter came and it snowed the grass just died or went away for the winter.— Chris
- i used to think that the ice cream man went into hibernation in the winter....Anon
- I used to believe that we had winter to cool off the earth because it got too hot. Thanks, mom.— Jon
- A hot totty was a hand warmer used in winter.— Kari
- I used to believe that at the beach town where we spent the summer, they took the sidewalks in for the winter.— Missy
- i used to think the song "walking in a winter wonderland" was "walking in a womens underwear"— stephen s