I'm carded for R-rated movies. And I get talked down to a lot. When I try to go rent a car or buy an airplane ticket or other stuff adults do, I get 'Okaaaaaay, honey.' I remember when I was 18, getting crayons in a restaurant. ↗
It was a huge shock. I've never had hair that short in my life! I think the rest of the cast and crew were mourning my haircut more than I was! But after a while, I felt liberated, I learned to embrace it. ↗
Even if one is interested only in one's own society, which is one's prerogative, one can understand that society much better by comparing it with others. ↗