Here in Europe I expect most people to have learned about the mechanical mechanism (wrist movement + ratchet + spring) in school. Do you not?

I feel many people dont understand what an automatic watch is. 
Many think it has a battery. 

Satosora

AskSN

Do you wear a smartwatch?

zuspotirko

Like a mechanical watch that tightens its spring with a ratchet and the natural movement of your wrist instead of by turning the crown 

I feel like everybody should know this. Maybe it's different in the US but here in Europe I expect all middle class people to have learned at least this much about machinery in school