There are some things we learn at similar ages.
As children, we're constantly updating the meanings of words and turns of phrase in school.
However, there are always a few things that slip through the cracks, and when we learn them it feels hilariously delayed.
When I was 10 I thought the word "masturbate" meant "contemplate." So I told my math teacher that I needed more time to "masturbate my math problem."
Also, when I was 15 I learned that a woman's eggs were not the same size as chicken eggs. I thought periods were so bloody because the chicken-sized egg was stretching them out.
Things aren’t supposed to start to get blurry at about 15-20 feet. Learned I needed glasses at like 26 from one of these threads. Yes people you are supposed to be able to see individual leaves on trees.