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Study: You may be a terrible dad because you have enormous testicles

Science!


Katie McDonough
September 10, 2013 9:28PM (UTC)

Researchers at Emory University believe there is a connection between the size of a man's testicles and how actively he participates in his child's life.

The study, published in Proceedings of the National Academy of Science, looked at the relationship between testicle size and fatherhood in 70 men who had young children.

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Researchers performed brain scans while the men were shown pictures of their children, and found that men with smaller testicles tended to have a more positive response to images of their children than men with larger testicles. According to the study, men with small testicles registered three times the response in the "reward" area of the brain than other men.

The small-testicled men were also more likely to play an active role in changing, feeding and otherwise caring for their children.

The study's findings may be linked to testosterone levels, but cultural norms and social expectations were not accounted for in the study and so the exact link remains unclear, researchers say.

But having enormous balls is no reason to be a terrible father, as researcher James Rilling tells the BBC: "It tells us some men are more naturally inclined to care-giving than others, but I don't think that excuses other men. It just might require more effort for some than others."


Katie McDonough

Katie McDonough is Salon's politics writer, focusing on gender, sexuality and reproductive justice. Follow her on Twitter @kmcdonovgh or email her at kmcdonough@salon.com.

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