Mate choice preferences of men and women willing to establish long-term relationships with individuals of their same biological sex has been an interesting topic for the evolutionary analysis, as there is a debate between the results of several investigations and the statements of the parental investment theory and the sexual strategies theory. The goal of this study was to identify the preferences of mate selection in men and women interested in establish long-term relationships with people of the same biological sex. In order to contribute to this discussion, a descriptive study was done, in which we analyzed the content of 732 men and women’s web profiles (H=491; M=241) that were seeking a stable relationship with members of their same biological sex. The analyzed categories were:age, physical attractiveness (appearance, body type, height and weight), socioeconomic status (labor situation, educative level and sought residential zone), civil status, number of children and healthy habits (smoke and drink). The found results show that men exhibit wide ranges in desired characteristics when looking for a mate (age=16.87; height=11.37; weight=15.23) besides, they seek younger couples than themselves (M=-4.17 years). On the other hand, women exhibit more restricted ranges (age=13.85; height=9.83; weight=12.77) and also they prefer older couples than themselves (M=2.89 years). In sum, it is evidenced that the found results in the majority of the variables could indicate congruence with the statements of the parental investment theory and the sexual strategies theory; however, in other variables the results are not clear enough.
