Handsome men have a lower quality of semen, reveals study. According to the study, increased levels of testosterone have been demonstrated to impair sperm production and the finding may indicate a trade-off between investments in secondary sexual signaling (i.e. facial masculinity) and fertility. The study also revealed that males estimated facial images generally more attractive than females did, suggesting that males may generally overestimate ...
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Wednesday, September 3, 2014
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