I read that vitamin D can increase a guys testosterone levels along with influencing development of the male sex organs.
So what all you guys need to do is get plenty of sunshine and eat foods rich in vitamin D like oily fish. As testosterone affects libido too we girls need to make sure you are eating the right foods. 😉
It does leave me wondering if guys from sunnier climbs have larger cocks than those not so fortunate to be bathed in sunshine most of the year. What do our Californian and Australian readers think? 😉