The man certainly has a point. While our ancient ancestors were solely focused on survival in a world where every turn could result in instant death, we've reached the point in time where sabre-tooth tigers don't threaten to exterminate us, so let's just get weird. Here we have Karl watching a group who find happiness in pain, raking hooks through their own backs before being suspended in the air, achieving nothing. "We've had the stone age, we've had the iron age, now we're in the pissing about age," as Karl would tell you.