The sense of superiority you get from being smarter than somebody is bittersweet, canceled out by the frustration of having to explain basic facts to a grownup.
A Reddit thread asked, "What's the stupidest thing you had to explain to an adult?" Hopefully you don't learn anything new.
Changing your password for one website doesn’t automatically change your passwords for all the other websites.-Checkmynewsong
I had to explain to a friend who is a nurse that her son, who had accidentally stabbed himself with a lead pencil, could in no way get lead poisoning.-DadsRGR8
2 for $3 deal. Had to explain that you had to buy 2 of them to get the deal and just buying 1 was not $1.50.-iflexnuts_