I thought adults actually knew what the hell they were doing.

I thought that when the clerk at the checkout asked, "would you like cash back?" That you could say yes and they would just give you cash straight out of the register for nothing lol.

I figured that most people were very honest and didn't need the money, so they would just say no thanks and leave it in the register for somebody who really did need it.

So many things...

I didn't understand how lie detectors were supposed to work so I thought you could hook someone up and ask something like "does god exist" and you'd be able to get answers to all of life's big mysteries.

I thought there was a left and right sock

I thought wolverines were mythical creatures

I thought if I tried hard enough I could somehow become older than my older brother like it was just a title or something

Thanks to DARE any time I saw a skittle with the S missing I thought it was drugs even in a newly opened package

I could go on..

I remember thinking that women gave birth to girls and men gave birth to boys, and being really worried because I (as a guy) didn't want to give birth.

I thought CEOs worked super hard

My dad told me that walnuts were owl eggs.

He got in trouble when I stole all the walnuts in the house and wrapped them in nose tissues to keep them warm so they would hatch and I would have baby owls.

I was trying to figure out what caused wind. I noticed the leaves moving when the wind blew, and I knew that a fan (handheld) also moved wind. So it stood to reason that trees moved causing the leaves to move which caused the wind. And naturally it must be earthquakes that caused the tree to love. And then I thought, we’ll there must be a master tree that started the wind, and the most “logical” place for that tree would be the North Pole.

So, that there was a tree on the North Pole that caused all the wind.

That adult humans knew what they were doing and had things in hand.

That sheep and goats were same species. I thought sheep were the girl versions and goats were the boys, like hens and roosters.

Wasn't until well into my 20s that I finally ran into something that put the spotlight on it... IIRC it was some Farmville type of videogame, which included males and females of both sheep and goats. To me, that stood out the same way a "female bull" or "male cow" would have, so I had a little chuckle at the obvious 'oversight'. Realized shortly after that I was, in fact, a fucking idiot.

I used to tell my kids that the ice cream truck only plays music when they are out of ice cream. My kids are older now and know the truth but think of all of the money I saved.

I thought cats were female and dogs were male. Can you tell I didn't have pets growing up?

I thought black and what television was black and white because history happened in black and white. I suppose that means life in colour happened after the invention of colour tv

I believed until I was 8 or so that beans were a type of meat. When I learned the truth, I had an argument with my older brother with me saying something along the line, "You're gonna feel real dumb when Mom says I'm right."

That trees create wind. Every time their branches start moving the wind starts to blow at the same time.
Also I thought that wind turbines are amusement park attractions where people are put inside the blades.

There was a coca cola plant in my hometown. When we were kids, my dad used to tell us that the huge water tanks that were painted as coke and sprite cans actually contained soda and I always imagined diving in them. Obviously he was just fucking with us, but I actually believed it for a while.

If you were cold then you would catch a cold.

You had to wait an hour after eating because if you swam after eating then you would sink.

Carrots will allow me to see in the dark if I eat enough of them.

If you did a bad thing then the universe would make a bad thing happen to you.

If you dropped food on the ground and picked it up quick enough it didn't have germs.

The USA was the good guys.

I thought peas were little unborn animals. Because they had a "cocoon". Refused to eat peas for years.

NSFW warning. I thought sex had to be anal. Just by the looks, it was impossible that a penis could pass through a vulva, and poop made it evident that it could pass through the rectum.

OP, that thing you believed is disturbing as fuck.

When I was a little kid and went to a store with my father, the registry had a ton of small coins and I assumed the guy behind the counter was super rich, because my dad had 5 or 6 coins in his wallet, and the guy had hundreds of coins. When my dad asked for change, and got a bunch of coins, I assumed the man was very generous and donated his money to my dad.

That me parents didn't have parents growing up. It somehow never dawned on me until I was like 7 that my grandparents were their parents, despite knowing my grandparents all my life.

When I was five or six, I think I must have dreamed that my dad could turn his head around 360 degrees. A few days later I was in the car with my Dad and asked him if he could really turn his head around. He responded "not now, I'm driving." I took that as a yes. It was years before I realized the truth...

I remember asking my dad if the Earth ever got heavier besides when meteors landed and babies were born.

I couldn’t comprehend that babies were made out of food. I thought they just came from nothing.

Being a hard worker gets you places.

That you could catch pneumonia from breathing in steam from the shower as I heard that a symptom is water in the lungs. A friend's dad died of pneumonia and I had to shower with my head stuck out of the curtain.

I used to believe in God, that was super stupid looking back.

Actors have to be married to kiss on screen

Believed this until I was like 16 and so did everyone else in our school.

A girl did anal and got pregnant and since it was anal that got her pregnant she was gonna poop out the baby. Funny thing is I was part of the group conversation that started this rumor and STILL we all believed it. 😭

Grew up on a dairy goat farm. I noticed we ate most of the boys and kept all the girls.

I was so scared; I had to ask my mom which one of me and my brothers were they gonna keep.

I used to think "euthanasia" was a country.

Homer Simpson wrote The Odyssey. I didn't know about any other Homer 🤷‍♂️

I thought when my mom said she would drop things off at Goodwill, she meant a giant, hollow wooden wheel full of tumbling clothing called Good Wheel. I imagined it looked a lot like a water wheel at a mill.

That America was good and a positive force in the world

That boogers were bugs that flew up my nose and died.

Because radio stations' DJs would say "and here's artist with song name", I firmly believed that one of two things must be true:

Radio stations had the bands always playing live for them

And/or

Radio stations would present a local DJ, but they would then tune in to the artist playing the track live for a larger station

What's even funnier about this is that my dad has at the time taught me how to use a tape deck to record radio and CDs to tape. So I clearly understood recording mediums. Just, the idea still lingered in my mind for a while.

I thought that during commercial breaks the characters in the show I was watching were still doing things and I was missing it because the commercials were not pausing the show in the background but playing over top of it.

Learned about cremation before I learned about death. Thought we all were burned alive at the end.

I thought that when you peed, your pee would go to a place where it was manually boiled on a stove, making it 100% clean drinking water, and then when you turned on the tap, they would get a garden hose and pour water into the pipe that gave you water. Somehow I assumed this all would be done manually with normal sized stoves and kettles, and that each tap had it's very own pipe.

I also thought that black people were just tanned, because colder countries had white people and warmer ones had black or brown people. Then I asked myself: why are there black people in cold places? I came to the conclusion that all the black kids in my kindergarten would eventually lose their tan and become white.

That your tongue is divided into segments which each can only taste certain flavors

I thought that cars were powered by the jet propulsion coming from the exhaust pipe.