www.smh.com.au/science full link will be added from a PC later
Scientists have found hormone regulators for male mice that bind with mouse testes.
Human Male fertility has been shown to decline with age as does bone density. Now there is intriguing evidence that the skeleton has direct roles in regulating not only blood sugars but fertility.
Early days yet in the studs er studdies. But it would indicate why women are attracted to jocks and the beauty isn't just skin deep. Exercise such as weights increases bone density. So a bit of weigh bearing activity may help not only in attracting a woman but in having a family. I wonder if there is an effect on astronauts fertility rates because of weightlessness.
Given that women aren't as attracted to over muscled brutes there is probably an optimum physique that is most fertile and hence most attractive
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