This is capitalism. Everything converges to porn because everything becomes a product that can be bought, sold, and trades. The human being simply becomes an economic commodity but another way of saying that is that everyone is basically a prostitute in capitalist economies because every person is simply an economic commodity.

This system is maintained though various means but mainly via propaganda programming which is enforced by collective violence in order to maintain the safety of that collective because most people are cowardly sheep and will go along with whatever agreement they have all reached for preserving their own selfish interests.