The smaller the testicles, the better the dad
Great dads have smaller testicles, study suggests
What makes some fathers get up in the middle of the night to comfort their crying baby while others sleep right through? The size of their testicles may be a factor, a new study suggests.
The smaller a man’s testicles, the more involved he is likely to be in caring for his toddler son or daughter, suggests a study conducted by anthropologists at Emory University in Atlanta, Ga., and published Monday in the Proceedings of the National Academy of Sciences.
The researchers, led by Jennifer Mascaro, used an MRI to measure the testicles of 70 Atlanta-area fathers who had a child between the age of one and two and lived with the child’s mother as a family. The fathers and their partners had previously been asked a series of questions about who in their family was more likely to perform each of 24 parenting tasks such as changing diapers, bathing their child, take them to medical checkups or attending to them when they woke up in the middle of the night.
By scanning the men’s brains with an fMRI machine while showing them photos of their children, the researchers found they could predict which fathers would be more involved in their children’s care. Men who showed more activity in a part of the brain known to motivate animals to nurture their offspring performed more hands-on parental caregiving.
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http://www.cbc.ca/news/technology/story/2013/09/10/science-testicle-size-father-parenting.html
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