Pretty Sure Most Guys Already Know That Looser-Fit Boxers Are Better Than Briefs For Maintaining An Efficient Temperature Of 34C, Required For Sperm Production. Looser Boxers, According To A New Inconclusive Study, May Encourage Higher Sperm Concentration While Tight Briefs Do The Opposite. Guys Are Also Advised To Avoid Taking Hot Baths.
Is your underwear helping or hurting your chances of becoming a father? – CNNMen who wear looser-fit boxer shorts have higher sperm concentration but a lower follicle stimulating hormone level than men squeezed into tight underwear, a new study finds.