To say this is “middle ages theology” IMO is to embrace relativism.
The truth is society has moved radically from the place it once was. As Christians most folks can see clearly that brothels are wrong for the Johns and the Prostitutes. We can see clearly that a hook-up culture where folks go for one-night stand to one-night stand is wrong. We can see clearly that abortion is wrong.
What we missed was the errors associated with sex for reasons sex was never intended and the deification of sex.
We MIGHT still know that pornography is wrong, but sex for entertainment on nightly TV is fine. We MIGHT still know that prostitutions is wrong, but selling of products on commercials is just another purpose of sex. We might know that indiscriminate movement from one sex partner to the next is wrong, but we place so little importance on marriage that the indiscriminate movement from one marriage to the next is just fine.
The worship of sex means that we cannot tell others that their sexual desires and appetites should be controlled. The deification of sex probably makes this universally true, but it is especially true if I do not share another’s sexual appetites. Who am I to judge them (it is all relative).
The true teachings concerning sex have been so muddied that you post on a Catholic board something that is clearly radically flawed from a reasoned Catholic perspective.
The truth is, God created sex as procreative and unitive. Its purpose was and is to produce children within a union of man and woman. Human children are born far more helpless than are other infants and need parents to care for them. Human sociology is far more complex than that of other species and the presence of a mother AND father in this process is radically important. To remove either the procreative or the unitive aspect of sex is to frustrate its true purpose.
The consequences of the perversion of sex and the deification of sex are now played out in our streets, courts, hospitals and homes. Generations being raised on network TV absent clear teachings on these matters CANNOT see what was once clear (clear doesn’t mean followed universally, but clear still) to most members of the human race.
I would recommend reading Humanae vitae. If you don’t want to do that, this from a non-Catholic (and perhaps even of value to a non-theist), Rabbi Sacks, is still quite compelling: