Louis C.K. and why we have back pain...

Why do we experience so much back pain? Which emotions are tied to specific back pain? I was randomly watching an episode of Louie, and was stunned (and pleasantly surprised) to see an enlightening scene about our spine. 

In said episode, Louie hurts his back and goes to the doctor who says something like the following: "There's nothing we can do. The spine was designed for horizontal movement but humans made it vertical. However, it's not designed to be vertical and hold all of that weight. So, the discs bulge and slip and swell. It'll take another 20,000 years for it to adapt to being upright. It's an engineering mis-design. We were given a clothesline and we're using it as a flagpole."