I believe that everyone should be offered some grace since it's everyone's first time living, and we're all trying to figure life out. However, I also believe that common sense goes...a long way. Recently, BuzzFeed Community members shared the things they couldn't believe they had to explain to another adult, and some of these stories are so bewildering that all you can really do is laugh:

1."I was telling my sister, who was 35 at the time and thinks she's a genius, about how two friends of mine drove to Alaska. She asked, 'How does that work?' I told her that you cross the border into Canada and then drive the rest of the way to Alaska. She replied, 'Alaska is an island.' I informed her that Alaska is not an island and that she should never say she went to a better high school or college than me ever again."

-- hlane09

2."Someone said to me, 'Anne Frank is a fictional character.'"

-- sassypete77

3."I walked in just in time to stop a coworker from cooking a can of corn in the microwave. An unopened can of corn."

-- odaydaniel

4."I had to explain to a grown human who went to college for nursing what a semicircle was. I had to literally tell her that it was half of a circle."

-- lottaottars

5."One time, my older sibling and I had to explain to my cousin's husband (who was 35 at the time) that thunder does not come from two clouds crashing into each other. My soul left my body."

-- oldpumpkin393

6."I was explaining ovulation and fallopian tubes to my mother-in-law. She wanted to know why she didn't find eggs in her underpants every month."

-- Anonymous

7."I had a colleague once (a grown man, mind you) who didn't know that indoor cats use litter boxes. He genuinely thought the cats did their business all over the house."

-- katharinapape2111

8."I've had a patient ask me if you could get the flu twice."

-- bennieorrett

9."I was working in a bike store when an older lady came in to return a roll of reflective tape. She said it didn't work because when she took the tape into her dark closet, she couldn't see anything."

-- Anonymous

10."I once got into a very heated argument with a married 45-year-old man over the fact that urine comes out of a different hole than the vagina. He was literally yelling at me, a woman, insisting that 'everything comes out of the same hole!'"

-- foxytinlizzy

11."My niece didn't know that pickles were made from cucumbers. She thought there was a pickle tree or pickle bush somewhere."

-- Anonymous

12."I was out with my husband and mother. My mom didn't seem to understand the difference between Mexico and New Mexico. She's traveled to Mexico before, yet she seemed stunned when she found out it's a different country. It was so weird."

-- crimsonkay

13."I once had to explain to a library patron that we couldn't change the time of our solar eclipse viewing party to better accommodate her kid's naptime. I had to tell another person that we did NOT have an audiobook of Macbeth ready to read by the author, and that no other place did. After nearly 25 years of customer service, there's little I don't believe."

-- skiinggnat

14."My sister was visiting from a different province, so I thought it'd be nice to take her to a museum with my son. The museum has displays and galleries of dinosaurs and various animals of various ages. We were looking at some dinosaur displays when my sister said, 'Can you imagine how difficult it must have been for humans to live among these dinosaurs?' My son, who was five at the time, and I looked at each other in amazement! Even my son knew that humans and dinosaurs didn't co-exist. I tried explaining it to my sister, but she didn't believe me."

-- Anonymous, Canada

15."I had to explain to my grandmother that lamps do not 'leak electricity' when they don't have lightbulbs. Later, I found out that my mom and her sisters, my grandfather, and my grandmother's siblings have all tried explaining it to my grandma at one point or another. It clearly never stuck."

-- Anonymous

16."I had to explain to a 26-year-old college graduate who majored in geography that Kentucky is, indeed, a state."

-- tyfherring

17."I spent years as a server and had to explain to countless people that mayo is, in fact, dairy-free. About half of our guests who've said they were lactose intolerant would ask for no mayo because they thought it was dairy. I guess the assumption is that if it's white, it's dairy?"

-- dazzlingsedan836

18."My ex-spouse would turn down the radio whenever they were low on gas. I finally asked why. It turns out that they thought all of the car's systems were running on gas. They were 38."

-- Anonymous

19."Once, my brother-in-law said that coconut milk came from brown coconuts and coconut water came from green coconuts. My mom, a retired science teacher, explained to him that the color of the coconuts didn't matter, and that the milk came from the white skin on the inside of the coconut, and the water was just whatever was inside the coconut. My BIL kept saying she was wrong, so they bet on it and had me Google the answer. My mom won the bet and got a free dinner out of it."

-- Anonymous, 33, Florida

20."I had to explain to my friend that, no, 'salmonella' is not Spanish for 'salmon.'"

-- Anthony, 31

21."A passenger on a flight asked why we were delayed, despite the captain just explaining that the aircon was not working and that techs were repairing it. The passenger asked, 'How come we don't open the windows?' I stared at her for a long time, wondering if she was joking. Then, I stared longer, wondering if it was possible for her to ask such a question. I explained why opening the windows wasn't possible due to the cabin air pressure issue and the lack of oxygen as we go higher. She really believed we could open windows on an airplane and let air in. I was riddled with shock."

-- Claudia, 50

22."I had to explain to a full adult how time zones worked, and that you didn't need a passport if you're flying somewhere within the same country. I brought out a globe and everything."

-- Anonymous

23.Lastly: "Years ago, I made tamales and brought some to work to share. A coworker was eager to try them because they smelled so good. Later that day, she told me that, though the tamale was good, she had to take it apart because she 'couldn't eat the outer part.' She'd been trying to eat the tamales with the corn husk wrapping still on them."

-- greyhedgewitch

*Sigh.* I need to go take a lap or something. What's something you couldn't believe you had to explain to an adult? Let us know in the comments, or you can anonymously submit your story using the form below!