A growing empirical literature demonstrates that the only sexual behavior consistently associated with indices of better physiological and psychological function is the one sexual behavior relevant to potential gene propagation. In the present study, 30 Portuguese women reported on their frequency of different sexual behaviors and corresponding orgasm rates and also completed the Perceived Relationship Quality Components (PRQC) Inventory. As hypothesized, frequency of penile-vaginal intercourse correlated positively with PRQC dimensions: Satisfaction, Intimacy, Trust, Passion, Love (all r >/= .40) and Global Relationship Quality (r = .55). Noncoital sexual behaviors with a partner were uncorrelated with the PRQC dimensions. Masturbation frequency was inversely associated with Love (r = -.38). Penile-vaginal orgasmic frequency correlated positively with PRQC dimensions: Satisfaction, Intimacy, Passion, Love (all r >/= .44) and Global Relationship Quality (r = .52). Penile-vaginal intercourse orgasmic consistency was inversely associated with masturbation frequency. Social desirability scores did not confound the associations. Results are discussed in terms of both evolutionary and psychoanalytic theories.