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In asia and europe the zippers are on the wrong side.
Isnt it a status thing? Like zippers and buttons are on that side because they would have servants dress them?
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Pretty much this.
Back in the day men (regardless of class) usually dressed themselves while upper class women were assisted by servants. Womens clothes were also much more complicated and things like corsets and such required help fastening in the back, plus it was a status thing.
Since most people are right handed it was easiest for servants to do this with buttons and zippers (once those became a thing) were on the other side. Only reason for this now is tradition in manufacturing it simply became a thing over the years.
There is obviously no functional difference and most people will never notice unless they are "into clothing" or in the business. I have a mens tweed waistcoat (aka vest) that buttons opposite. I've seen a couple of odd mens clothing items that were opposite but definitely mens clothing item. Uncommon but occasionally turn up.