Side of the bow

[qwerty]

Bow is traditionaly on the left side of the hat. Why?
Is it some kind of statement; like men wear it on the left side and women on the right or something like that?
When did this start?

 

[Uncle Vern]

Cavaliers and various swordsmen wore long feathered plumes on their hats that reached nearly to the ground. The plume sprouts from the left side of the hat so a sword can be drawn with the right hand and not get tangled up in the feathers. Over time, the plumes got shorter, but the bow, a vestige of the long plume, stayed on the left side.

 

[J. M. Stovall]

What if you where a lefty?