As luck would have it, there is a biologically explainable reason for why many men cannot commit to marriage and make poor mating partners.
It’s vasopressin. Heard of it?
Scientists at the Karolinska Institute in Sweden have found that the hormone vasopressin is vital in deciding whether a man is good “husband material.”
According to the study, differences in a gene modulating vasopressin were strongly tied to how well each man fared in marriage.
Vasopressin is released in the brain of males during mating. Men carrying the vasopressin Receptor 1 scored on average lower on a scale measuring the strength of the bond compared to men not carrying this variant. Women married to men carrying the poorer bonding form of the gene also reported lower scores on levels of marital quality than women married to men not carrying this variant.
The researchers however stress that the effect of this genetic variation is relatively modest, and it cannot be used to predict with any real accuracy how someone will behave in a future relationship.
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“Honey, this relationship isn’t working for me. I think we need to take a break … No, no, stop crying; it’s not you. It’s not me either. It’s the bloody genes.”
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The full report on the vasopressin study is available in this week’s issue of the Proceedings of the National Academies of Science.
A press statement from the Karolinska Institute on this study is available here.