S.F. suffered the brunt of the4 AIDS epidemic of the 1980s, so I assumed their thought pattern would be, "Well, the gay community here uses lots of rubbers. Why don't they just do it down in L.A.?"
As for the people in L.A., we all know they are huge consumers of porn too. It's just that they can go up the street to get their porno directly, not order it online.