Retrieved November 30, Research has found that men are a lot more attentive and loving towards their partners when they are in the most fertile phase of their cycles, in comparison to when they are in the luteal phases. It is therefore suggested that females are attracted to masculine faces only during ovulation as masculinity reflects a high level of fitness, used to ensure reproductive success. Similar to the function in animals, it is probable that this ornamentation is to attract potential partners and that a woman's motivations may vary across her cycle. The degree to which such fetishism exists or has existed in different cultures is controversial. Please improve this section by adding secondary or tertiary sources. 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.
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A meta analysis, investigating 50 studies about whether women's mate preferences for good gene-related male traits changed across the ovarian cycle found that women's preferences change across their cycle: Women show the greatest preference for good gene male traits at their most fertile window.
Bailey, Gaulin, Agyei, and Gladue analyzed whether these results varied according to sexual orientation. Research has also found that menstrual cycles affect sexual behaviour frequency in pre- menopausal women. As with masculine faces, the ability to determine symmetry via scent was likely designed by natural selection to increase the probability of reproductive success through mating with a male offering strong genetics.