: : Syphilis cases in California have contributed to soaring national caseloads of sexually transmitted diseases. Experts point to the advent of dating apps, condom fatigue and an increase in meth. In certain circles of San Francisco, a case of syphilis can be as common and casual as catching the flu, to the point where Billy Lemon can't even remember how many times he's had it. "Three or four? Five times in my life?" he struggles to recall. "It does not seem like a big deal." At the time, about a decade ago, Lemon went on frequent methamphetamine binges, kicking his libid...