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Sniff this Research reported last month found women both smell and look more attractive to men at certain times of the month. Borrowing sweaty undershirts from a variety of men, Thornhill offered the shirts to the noses of women, asking for their impressions of the scents.
Hands down, the women found the scent of a symmetrical man to be more attractive and desirable, especially if the woman was menstruating.
In some cases, women in Thornhill's study reported not smelling anything on a shirt, yet still said they were attracted to it."We think the detection of these types of scent is way outside consciousness," Thornhill said.
A 2002 study found women prefer the scent of men with genes somewhat similar to their own over the scent of nearly genetically identical or totally dissimilar men.
If a woman produces the proper amount and mixture of estrogen, then her WHR will naturally fall into the desired range. People in the ideal hip-ratio range, regardless of weight, are less susceptible to disease such as cardiovascular disorders, cancer, and diabetes, studies have shown.
Women in this range also have less difficulty conceiving."The idea is that beauty is conveying information about health and fertility, and we admire that," Singh said in a telephone interview.
By questioning the study participants, Thornhill also found that men with higher degrees of symmetry enjoy more sexual partners than men of lower symmetry."Women's sex-partner numbers are dependent on things other than attractiveness," Thornhill told .
Other rules work at the subconscious level, motivating us to action for evolutionary reasons that are tucked inside clouds of infatuation.
Face it The structure of a person's face also gives insight to fertility.
Estrogen caps bone growth in a woman's lower face and chin, making them relatively small and short, as well as the brow, allowing for her eyes to appear prominent, Thornhill explained.
These subconscious scents might be related to pheromones, chemical signals produced by the body to communicate reproductive quality.
The human genome contains more than 1,000 olfactory genes—compared to approximately 300 genes for photoreceptors in the eyes—so pheromones have received a lot of attention from basic research scientists as well as perfume manufacturers.