As an important safety tip, mom used to tell me to have my keys ready in my hand when entering a parking garage (kinda strange advice for a 5 year old, but you never know).
For the longest time I thought women did this because the keys could be used as a weapon to gauge an attacker's eyes out.
A childhood belief about cars

others believed things like this
- I used to think that robbers had keys to every house and that's how they got in to take your stuff— Emma
- When i was younger i used to believe tha the cat gave Santa the keys to the house to get in !— Nikki Kellett
- i used to believe the sound from a piano came from the keys hitting a stuff called "sploosh"{wierd, huh?}.— exploding buttox
- I used to think that the E on a gas gauge meant "enough"...Anon
- I used to think that if you had a garage sale that meant you were selling the garage!— ~Curtis~
- For the longest time I thought 90210 was a sitcom Anon