Discussion w/ a Theist RE: Premarital Sex

[StealthySkeptic]

Interestingly enough, our evolution into bipedalism meant that human female hips had to become narrow in order to not cause our legs to topple over. But that narrow birth canal means that childbirth is always going to be naturally painful. A rather awful design, no?

Given the % of children and women who die in natural, no-hospital childbirth, bipedalism represents a truly massive risk and investment in having free hands. You're right-- it's quite remarkable for such a killer trait to persist so strongly.

Scientists are still divided on what exactly bipedalism did to help us out as a species, but I lean towards the idea that male Recent Common Ancestors who later diverged into humans succeeded because they now had their arms free to carry home food to their mate. Later on, it also allowed us to see predators at a distance and become the best long-distance runners in the animal kingdom, with our successful strategy being to chase prey animals in a low energy way for us until they were too exhausted to fight back.

And speaking of the changes this caused, ape genitalia in females, especially bonobos, is usually bright red. Obviously that wouldn't work for us because of the changes in body orientation caused by bipedalism, so a larger butt became the unmistakable sign for males that they were well fed, as did larger breasts that would nurture young.

Like, for instance, the famous prehistoric Venus:



Thankfully, some happy medium seems to be slowly being reached between obesity considered attractive (at a time when starvation was likely) and a size 0 being the ideal. Anyway, human vaginas also became longer and narrower because of the now narrow female hips, and so human penises became the longest (on average) in the great ape family to accommodate that.

Thanks, evolution!