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Boxer briefs? Tighty whities? Strings? All seem to influence sperm quality. Also, a study on miscarriages in primates shows they happen more often when raising a small (demanding) child.
Boxer briefs? Tighty whities? Strings? All seem to influence sperm quality. Also, a study on miscarriages in primates shows they happen more often when raising a small (demanding) child.
