男内裤问题： 宽松大裤裆 如老式“军火” ，虽宽松透气，但没有任何约束/固定，运动时会 烂裆， 尤其剧烈运动可导致睾丸/精索扭转, 使精索内的血液循环发生障碍 ； 普通紧身内裤，如运动内裤都是紧身的三角裤或四角裤，虽不烂裆 但紧身会给阴囊保温，从而引起其它健康问题 (详细请点击上面医学根据)。
《牛津医学课本》第282页，32行：The lower temperature in the scrotum is a prerequisite for normal spermatogenesis. 低温是保证阴囊正常产生精子的前题。作者： David A. Warrell, Timothy M. Cox, John D. Firth 牛津大学出版 。
美国威斯康辛大学指出：Heat can reduce sperm count and testosterone production. 热会减少精子数量和睾丸素的产生。
官网链接： http://www.fammed.wisc.edu/files/webfm-uploads/documents/outreach/im/handout_testosterone.pdf
哈佛大学2018年研究证明：男内裤影响精子和激素的合成。 “Beyond providing additional evidence that underwear choices may impact fertility, our study provides evidence, for the first time, that a seemingly random lifestyle choice could have profound impacts on hormone production in men at both the level of the testis and the brain,” said Jorge Chavarro, senior author of the study and associate professor of nutrition and epidemiology.
官网链接： https://www.hsph.harvard.edu/news/press-releases/does-underwear-style-affect-sperm-production/
解决方案： Mr Right 优生男内裤采用紧身四角裤设计以不烂裆 ，并利用腹股沟和臀沟的3个沟形成3个烟囱效应给阴囊自然降温，使其在最佳温度区。 已获澳大利亚，中国等国专利。
精子的数量/冠军精子质量直接影响新生婴儿是否健康聪明，
不输在起跑线上，从穿对内裤开始！
欢迎投资入股专利优生男内裤，联系电邮：info@rightunderwear.com
欧洲心血管期刊： 男性睾丸素低会导致约30%的死亡，尤其心血管方面的死亡。
A low testosterone [hypogonadism or testosterone deficiency syndrome (TDS)] may be present in 30% of men and present in a number of different ways…There is increasing evidence that TDS is associated with all-cause mortality and in particular cardiovascular death.
European Heart Journal
https://academic.oup.com/eurheartj/article/31/12/1436/466160
美国Buffalo大学：男性肥胖同睾丸素低相关联。
Male Obesity Linked to Low Testosterone Levels,
University of Buffalo
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