It seems you are more to vent in this thread, and I understand that, but I just wanted to say friendship isn't as intense as romantic love. In principle sex is for social bonding and procreation, which both are necessary for species survival. So, I think your theory is true. I suspect though most people would accept a romantic relationship without sex. But I think we humans now in a stage that evolution has no control over us because of our large brains, because how then can you explain monks and hermits?! As professor Paul Bloom a psychology professor at Yale university says: genes don't mean necessity any more.