Records of the sexually transmitted disease (STD) clinic visits of 12,728 patients in Columbus, Ohio were analyzed to better understand the behavior patterns of these patients. Among heterosexual men, a greater proportion of Blacks than Whites reported a previous history of urethritis. After controlling for previous STD among heterosexual men with discharge or dysuria, we found that Black men sought treatment sooner and were more likely to curtail sexual activity than White men after becoming symptomatic with gonorrhea or nongonococcal urethritis.