The blanket ban would represent an escalation of a two-year tiff between a devoted group of men who strut their stuff through the city's famously gay Castro District and the supervisor who represents the area.
Supervisor Scott Wiener's proposal would make it illegal for a person over the age of five to "expose his or her genitals, perineum or anal region on any public street, footpath, street median, parklet or plaza" or while using public transit.
A first offence would carry a maximum penalty of a $US100 ($A97.26) fine, but prosecutors would have authority to charge a third violation as a misdemeanour punishable by up to a $US500 fine and a year in jail.
Exemptions would be made for participants at permitted street fairs and parades, such as the city's annual gay pride event and the Folsom Street Fair, which celebrates sadomasochism and other sexual subcultures."
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