One of the great contributions of Christianity to the Roman Empire was the suppression of both sodomy and prostitution.
Well, Christianity gave people a reason to live a life above that kind of depravity. It informed them that there was a God above all who made them and who desired them to turn from sin, be forgiven, and choose to glorify Him and that He would reward them if they did so. Call it suppression by spiritual displacement, if you have to call it suppression at all.