Buttons Right, Buttons Left

From time to time I encounter the ques­tion, var­i­ous the­o­ries are dis­cussed — but in the end, every­one is as clue­less as before: Why are but­tons on men’s dress on the left-hand side, while they are on the right-hand side on wom­en’s clothes? I decid­ed to do some research.