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The Guardian
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Aw, nuts! Nurturing dads have smaller testicles, study shows
NBCNews.com
Do men with small balls make good fathers? That may sound ridiculous, but Emory University scientists have found that men who tend to enjoy being a nurturing parent also tend to have smaller testicles. The study, released today in the Proceedings of the ...
Of Dads and Gonads: Smaller Testicles Linked with Caring FathersLiveScience.com
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Testicle size may indicate men's childcare aptitude, suggests US studyThe Guardian
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