The effect of HIV-discordance on the sexual lives of gay and bisexual men in Mexico City.

Drawing upon 44 in-depth interviews with men in HIV-discordant gay couples (only one man is HIV-positive) in Mexico, I explore whether being aware of the risk of primary infection or re-infection leads to protected sex. The results have policy implications, as the findings show that a significant number of men have participated in unprotected sex. An explanation is that these men perceive unprotected sex as an expression of commitment to their relationship. On the other hand, those who reported always using protection during sex perceive that guarding each other's health provides mutual benefit and shows their commitment to their relationship.