We have a work area with school desks for some reason, of the crappy right-handed variety. So I notice when colleagues awkwardly try to use the desks and they’re left-hand dominant.
I have a friend who is left-handed and insists on shaking hands left-handed. She will stare down anyone until they offer their left hand or do a weird fingertip shake with their right. Anyone who manages to shake her left hand without looking like a goober, she excitedly welcomes to the left handed club.
I don’t notice which hand they use, but more often than not, lefties will write with their hand curved over (and smudging) the text they just wrote instead of from beneath (and not smudging.) That’s when I notice. So when I notice, I don’t say, “You know you could prevent getting graphite (or ink) everywhere…” I say, “Ah. Leftie.”
I have seen righties do the same weird smudging with the arced wrist. Why do people write like that?
Because people learn how to write as young children in a place that typically has no experience with a proper technique for left-handed people, and re-learning how to write is not as easy as thinking to yourself that a different way would be better.
It’s probably good you don’t say the “you know” because that would be dumb as fuck.