What is the stupidest thing you ever had to explain to someone?

1. Ok so I got into an argument with my neighbor that resulted in us not talking for 3 weeks because an airplane was making random designs in the sky and she said “maybe it’s braille for the blind” and I said “how could a blind person read the Braille if it’s in the sky” and this lasted like 15 minutes and she just wasn’t getting it.
   — Anon164hdu


2. That you don’t need special glasses to see the world in 3D.
   — crunch816


3. One day my ex wife (wife at the time) needed me to drive her and her friend to work. We only had 1 car. They worked about 60 miles from home. Her friend usually drove them in her own car. I needed the car while she was at work, so I agreed to drive them. -keep in mind that I've never driven there before. Also, this is easier to explain on paper. So as we are getting closer, they tell me to take the exit from the interstate. I do. We get to the end of the exit and they tell me to turn right. We then approach a stop light, turn left. Okay, now go down this road. Turn left into this parking lot. Okay, turn around and turn right when you exit the parking lot. Now we're at a stop light, turn right. Okay, turn right to get on the interstate. As I got back on to the interstate, I'm like "WTF?!" ME: "You guys do this every time you come to work?" Them: "yeah, that's how we were shown." ME: "You know you don't have to take this exit, right? You can just stay on the interstate." Them: with a confused look "Really?" TL:DR My ex wife and her friend had driven to work numerous times on their own. Every time they drove there, they took an exit ramp only to turn around and get back on the interstate they exited from. notes: Giving them the extreme benefit of the doubt, the first person that showed them how to get there probably took the wrong exit, as their exit was the next one about a mile further up the road. They just went with what they knew without using common sense.
   — Lux_Interior9






4. So my friend is getting the new Tesla and they said she would get it faster if she upgraded to the 19" rim instead of the 18" rim. Okay, cool. I was telling her that the lower profile tires are more expensive *cue deer-in-headlights*. She was trying to tell me that she would just buy the 18" tires and put them on the 19" rim to save some money. I spent well over an hour trying to get her to realize that tires are sized to the rims and you can't mix and match. She is still under the impression that the rubber is flexible enough to stretch an 18" tire to fit a 19" rim... I just ordered another beer and changed the subject.
   — TheJigglyJogger


5. A co-worker many years ago was adamant, "they're called Jews because they're from Jewrusalem." =(
   — Thousand1k


6. My student teacher in my 10th grade American History class. We were looking at Great Depression era photographs, and one was a photograph of some guys reading the newspaper the day after the crash in New York. They were standing under an awning attached to a building that had the number "1326" on it. She suggested that 'maybe that was the date that place was established'. I raised my hand and suggested that it was probably the street number. In a slightly dismissive tone, she said "Maybe."
   — CTMalum






7. My friend locked his bike by putting the chain around one handlebar. Had to show him why that wasn't the best method
   — zrstew


8. I periodically have to explain to people that the questions they ask me while we are watching a movie will be answered within the movie itself.
   — okzacb


9. [removed]
   — [deleted]






10. How butter is made,,,. Girl in college seriously thought it came right out of the udders of a cow....
    — Frostyfyre1


11. That a phone book wasn’t a book about phones
    — mo799


12. That the sun is a star. First date she ranted about her "fucking idiot professor" teaching students something so "stupid." I agreed with the professor so she called me a retard and buried her nose in her phone. I "went to the bathroom," paid my half of the bill at the bar and left.
    — Imapony






13. I constantly have to explain to my mother that cities east of us in the United States are all in the Eastern Time zone and hence on the same time as us, since we live in the Eastern Time zone.
    — mw407


14. That olive oil comes from olives. Also that the Pentagon is named the Pentagon because it is a pentagon. Same person for both. Usually pretty smart but has some moments.
    — royal_rose_