Behaviors associated with increased risk for sexual transmission of human immunodeficiency virus (HIV) by infected persons include unprotected intercourse, multiple sex partners, use of crack cocaine, failure to disclose serostatus to sex partners, and trading sex for money or drugs. Some sexually active, HIV-infected persons in the United States continue to practice risky behaviors. To characterize continued sexual risk behaviors among HIV-positive, illicit-drug using men, in 1993 CDC analyzed data from such men recruited for a small group-intervention program in three cities - Atlanta; Washington, D.C.; and San Juan, Puerto Rico. This report summarizes the results of that analysis, which indicate that some seropositive men continue to engage in unprotected sex.