I was a stupid child (and sometimes a stupid adult)
When I was little, my brother convinced me I went to Kindergarten twice. I believed him until I was in my 30′s, when my mom and I were having a conversation and I said something about being in kindergarten 2x. When she stopped laughing at me, she pointed out that had I done kindergarten twice, I would have been one of the oldest in the class, not the youngest. I think it just proves I suck at math, which is why I would believe my brother when he told me I did it twice. I was bad at math, had to get better at it before going to first grade (makes sense to me)
When I was little, I had a toy cash register, as most kids do. One day my brother and I were playing store (my brother must have either been bored, or punished if he was playing store with me) and he was the cashier and when I went to pay he told me I could not buy stuff that was not on sale. I believed this as well until I started shopping on my own. I would go shopping w/ my mom and sometimes my dad would come along, but not often, and I always thought everything she bought was on sale. Once I started shopping on my own, when I was 30 and lived on my own (shut up, I didn’t want to rent) and went food shopping and nothing was on sale (Coupons were a new concept to me as well)
Come to think of it, maybe I wasn’t a stupid child, maybe my brother was really mean.
He doesn’t remember telling me these things, but knows he did, because that’s what older brothers do. Torment the younger child. It’s like a law or something.