We've all been both the person explaining the dumb thing to another adult and also the adult who has needed the dumb thing explained to them. None of us are perfect and none of us know everything, even though we like to pretend that we do. At the end of the day, we're all human and we all make mistakes.
Some of those mistakes...however...are more cringe-worthy than others.
Have you ever had to explain a seemingly obvious thing to a person who should definitely know it already? I'm not trying to sound vague or cryptic here, but it's honestly astounding how many times people have explained ridiculous things to other adults.
You can always trust Reddit to come through with people sharing hilariously entertaining and cringe-y stories. One subreddit recently had people sharing the most ridiculous, dumb things they've had to explain to other adults. Some of these answers will truly have you shaking your head in disbelief.