I know, right?!
To the right. Naturally it falls to the left, but I like it on the right as it makes a bigger show! Worn it that way for 30+ years. I always keep an eye out for other guys; of those who are 'obvious', most seem to be left-dressers.
I'm really surprised that all you guys knew what this meant. I thought it was political at first! LOL
I am a sewer and make many men's clothes (including some of my own) and have never asked this or considered it. Maybe it was more of a concern when pants were very tight fitting (1970's). Today's styles tend to have more room in the crotch.