When wearing either a yukata or a kimono, what etiquette, if any, is there about where the knot goes? Do only sex workers (whose work is illegal nowadays in Japan) deliberately wear a knot in front of them?
Wikivoyage informs users not to wear right over left with their yukatas, as that's associated with the dead, but doesn't have anything about knots.
Wikipedia says that bows in the front of a yukata represents a sex worker, but doesn't have any citations backing it up.
This guide has a knot just off-centre in front of the person, while this guide has a knot behind the person.