The first group consists of men who engage in UAI within committed HIVseroconcordant relationships. Whether seropositive or seronegative, UAI in these dyads appears to be motivated by feelings of love and trust, and a desire to express emotional intimacy. For monogamous non–drug-using seronegative couples, the risk of HIV infection is infinitesimal (Kippax et al., 1993, 1996).