"西班牙和芬兰的研究者则发现，与俊朗的男性相比，相貌平平的男性精液质量反而更好。研究者用“权衡假说”理论来解释了其中的原因，即男性投入到生殖资源的能量是固定的，如果一个男性把更多的资源用于精液生成，那么他用于外貌特征的资源就会减少。"
- See more at: http://tech.creaders.net/2015/08/28/1575548.html#sthash.dNel40lD.dpuf

Masculine face can indicate poorer sperm quality

“As increased levels of testosterone have been demonstrated to impair sperm production, this finding may indicate a trade-off between investments in secondary sexual signalling (i.e. facial masculinity) and fertility or status-dependent differences in investments in semen quality,“ the researchers say.

Preceding studies demonstrate that facial attractiveness strongly influences women’s mating preferences. Defenders of the so called phenotype-linked fertility hypothesis argue that sexually appealing face can be a signal of better semen quality. However, appearances can be deceptive. Development of the secondary sexual cues, such as voice tembre or facial masculinity, is strongly dependent on testosterone levels.

“High levels of circulating testosterone can impair sperm production and thus potentially also lead to reduced sperm quality. According to the sperm competition theory, males may face a trade-off between acquiring mates and gaining fertilizations,“ the biologists explain. If this theory is correct, men having more masculine face should produce semen of lower quality.

http://www.technology.org/2014/09/03/masculine-face-can-indicate-poorer-sperm-quality/