What Is The Common Sense Thing You Thought Everyone Knew But Found Out They Did Not?

Ah, common sense. It is different for everyone. So, today, we want to know a basic thing you know that you eventually figured out most people don't know.

For example, some people may not know that odd and even addresses are on the opposite sides of the street.

Were you aware that you can't just milk a cow whenever? Cows have to give birth before they can produce milk!

Did you know you are supposed to turn your lights on when it is raining?

And speaking of cars, were you aware that the arrow next to your gas pump symbol on your dash tells you what side of the car your tank is on?

So, tell us what fact you know that most people don't! Drop your responses in the comments and you could be featured in an upcoming BuzzFeed Community post!