Does anybody actually keep their longarm on their shoulder?

I like the way it looks on the back, and with all the running I do it would just fall off. And with Arthur's walk he tilts his shoulders some so it would also fall off then. I just don't understand why you would do it unless you're carrying 2 longarms at once (which I usually don't do). I'm not hating on anybody who does I am only trying to see if anybody really does it, and if so do you like the way it looks? or you just don't care and you stick with where the game automatically puts it.