This isn't me, it's something my younger brother thought:
A couple years ago, my brother said that he liked our grandma's TV, because it had a bigger screen than our one. Why was that so good? He thought that smaller-screened TVs didn't show all the picture, some of it got chopped off. He had lived about 7 years in a house that has a few various-sized TVs and never noticed that the picture got smaller on smaller TVs.
A childhood belief about tv

others believed things like this
- I used to believe that clothes got smaller if you didn't wear them very often.Anon
- I thought the big hand was for the hour and the smaller one was for the minutes until i was in third grade.— Time Challenged
- When I was smaller I used to think that if I broke the Tv the characters would come out x]Anon
- I used to believe a pickle was a smaller version of the cucumber.Anon
- I used to believe that wearing a bra that was too small would make my boobs get smaller.— Aretia
- When I was a child I used to believe that the things in my room became smaller but it was me who was growingAnon