id author title date pages extension mime words sentences flesch summary cache txt en-wikipedia-org-5773 Sexual attraction - Wikipedia .html text/html 4679 573 57 Asexuality refers to those who do not experience sexual attraction for either sex, though they may have romantic attraction (homoromantic, biromantic or heteroromantic) or a non-directed libido.[2] Interpersonal attraction includes factors such as physical or psychological similarity, familiarity or possessing a preponderance of common or familiar features, similarity, complementarity, reciprocal liking, and reinforcement.[3] In evolutionary terms, the ovulatory shift hypothesis posits that female humans exhibit different sexual behaviours and desires at points in their menstrual cycle, as a means to ensure that they attract a high quality mate to copulate with during their most fertile time. The ovulatory shift hypothesis refers to the idea that female humans tend to exhibit different sexual behaviours and desires at points in their cycle, as an evolutionarily adaptive means to ensure that a high quality male is chosen to copulate with during the most fertile period of the cycle.[4] It is thought that, due to the length of time and the parental investment involved for a woman to reproduce, changes in female psychology during menstrual periods would help them make critical decisions in mating selection. ./cache/en-wikipedia-org-5773.html ./txt/en-wikipedia-org-5773.txt