After my dad explained to me that the searchlight beams I'd occasionally see at night were like commercials - "adverts" to some of you, and meant to attract attention to an event or a business - I imagined that every time I saw one, it meant that a commercial was about to appear on a TV set somewhere.
A childhood belief about adverts

others believed things like this
- i used to believe that sex meant love and that having sex meant the two people would live happily ever after.— amy
- I thought for the longest time that a No Standing traffic sign meant no person should stand near that sign.— Shannon
- I thought if someone worked full time it meant they worked 24/7 and never did anything else!— andalite
- my friend thought that the film 'the hulk' was about the jolly green giant from the sweetcorn adverts.— patticus
- I used to believe whenever I got an erection it meant I had to pee.— Adam
- I used to think that the E on a gas gauge meant "enough"...Anon