It is not a symbol as you describe…
It is a rod which represents the back… not a actual sexual part.
It is ok we can tell where your head is at though…
It is so cool if you to be transparent… and all…
Aka the back bone or the medical field… this was an ancient medicine thing but they also made advisors to kings and other officials. Funny how some of this is true to this day.
Again something that is missed and not understood.