The evolutionary psychology has demonstrated that sex has functions beyond the
reproduction having evolved for promoting the emotional proximity of the couple and
increasing the degree of satisfaction with the partner. However, most studies have focused
on explaining the sexuality of heterosexual couples, thus leaving a gap with regard about
sexuality of homosexual women. Nowadays there are signs about differences in the quality
of sex life of women heterosexual and homosexual, as well as it has been observed that
homosexuals groups do not constitute a homogeneous entity, with differences in lifestyle,
preferences, and hormone levels. This study aimed to investigate the quality of sexual life
and differences in free testosterone levels in three groups of women: hetero, homosexuals
femme and homosexuals butch using the instrument Female Sexual Function Index due to its
ability to measure the domains of sexual function. Participated in this study 55 heterosexual
women, 39 femme and 17 butch. As regards sexual practices, 64.7% of participants in the
butch group would like to have five or more sexual intercourses per week, versus 46.2% in
femme group and 34% in the hetero group, demonstrating that homosexual women have
more sexual desire. Heterosexual women showed lower frequency of preliminary activities
such “be masturbated by the partner”, where 35% practice more than once a month, while
59% of the femme groups and 41% of butch groups practice more than once a week. Similar
results were found in “receiving oral sex from the partner”, where 41% of hetero reported
practicing more than once a month, while 51% of femme and 35% of butch's practicing more
than once a week. The FSFI score showed a significant difference between heterosexual
women (28.44) and the femme (31.31) and butch groups (30.82). The analysis of the salivary
testosterone showed that butch group has the highest concentration, reaching 99,2 pg/ml,
followed by femme group, with 56.09 pg/ml and lastly the hetero with 43.3 pg/ml.
Comparing the average testosterone there was a significant difference between the femme
and butch groups (p <0.01) and between hetero and butch (p = 0.001). Among the hetero and
femme groups there was no difference. Correlations were found between testosterone levels
and domains of the FSFI. In the group heterosexual there was a correlation with the domain
of satisfaction (r = 0.732, p = 0.01). No correlation was found in the femme group, in the
butch group occurred a negative and strong correlation with the domain of lubrication (r = -
0.621, p = 0.41). The results show that homosexual women are less likely to have sexual
dysfunction than heterossexual. Homosexual women invest more in behaviors generators of
excitement and orgasms as kissing, fondling, genital stimulation and receptive oral sex
compared to Hetero Couples. It is likely that investment in foreplay stimulation occurs
because of a greater desire in homosexuals women to have emotional closeness to their
partner, which may be different in a heterosexual relationship where the man possibly
practice the relation prioritizing their own sexual satisfaction.
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