For me it comes down to whether or not it is for a specific purpose(s) to enhance RP such as an event, a special RP, etc, having no permanency in everyday Gorean life. Though I suppose in some situations, it could become a standard such as characters wearing disguises and such.
However...
To do it as a matter of normality.... Not in my Gor. If females wish to break out their strap-ons and males wish to ram their dicks up between their asscheeks and forsake their balls, that is on them.