To screen for absence of sexual dysfunction, profile descriptions of all subjects were obtained via the Derogatis Sexual Functioning Inventory (DSFI)9 and the Orgasmic Functioning Questionnaire (C.M.M., S. Jung, BA, L. Hansen, MA, and B. B. Gorzalka, PhD, unpublished data, 1993) . All subjects employed in the study scored greater than or equal to the 30th percentile (ie, within 2 SDs of the normative mean) on the Sexual Functioning Index (mean, 57.35; range, 3-69) and the Drive subscale (mean, 55.55; range, 38-72). The Brief Symptom Inventory 10 subtest of the DSFI was used to screen for absence of general psychopathologic characteristics. All subjects scored greater than or equal to the 30th percentile on the total Brief Symptom Inventory scale (mean, 46.35; range, 32-62). Data from the Experience subtest of the DSFI were used to ensure that all subjects were within the normative range of sexual experience. All subjects scored at or above the 30th percentile on the Experience subtest (mean, 52.15; range, 30-63). As in previous studies of this nature,6,11- 13 data from the Orgasmic Functioning Questionnaire were used to screen for absence of orgasmic dysfunction. All subjects were able to achieve orgasm by some means (eg, intercourse, oral sex, masturbation) on at least 50% of their sexual experiences (mean percent, 81).