The problem emerges when he is led to believe that there is a better alternative to trying to find a woman to satisfy his needs and to find a bond with, that there is an ample abundance of not just easy access alternatives to what he desires most in his hormone driven dilemma but material that supercedes a normal woman, material to replace this drive with things he had not considered or would ever be introduced to in a normal, healthy society, new acts he had not been aware of. So much like the alcoholic he maybe dabbled once or twice a week, sneaking quiet periods to glimpse at these new acts in solitude. But slowly the resistance to it grows, slowly the man will become bored and want to see something new, something more depraved and down the rabbit hole he goes, every side link on the page introducing him to more and more degenerative and repulsive content. Bizarre sex acts involving unpleasant devices, the drive to fill an anal cavity with your semen despite the clear disgusting risks to both you and the woman, a need to watch women degrade themselves and in some cases see the man degraded in cuckold fetish porn, the list is unending and gratuitous. But what is the final result of this, is it the beginning of an organ shutdown, is it a slow death as you just continue to imbide all that poisons? In a manner of speaking.
You see, this "tolerance" that is built, it does not build within a specific organ but within the mind initially. You begin to find "normal" sex boring, it lacks the excitement, the interest of the more debauched things that you were already offered holds precedent resulting in a lack of function for your genitals, you struggle to reach a peak level. You will find it harder to get aroused at a normal female if all she will offer is "regular" sex, not something to fulfill your "kinks" (unless you intend to seek a broken whore, in which case you are destroying your life even more so by bonding with such a foul creature not to mention inviting in a slew of delightful sexually transmitted diseases). Your mind has become rewired, it has been repurposed to consume more and more of the very thing that is breaking apart your sexual understanding, it has warped them from the pleasure of procreation to pleasure in the taboo and the abominable. It corrupts at a fundamental level. Some may try and use semetic arguments around this, that to deny pleasure is to deny life but I am afraid such pathetic argumentation holds little weight. It is of little wonder the French aristocracy suffered the fate it did with the likes of the Marquis de Sade running around raping children to fill his disgusting lusts for that is the inevitable result of such argumentation in favour of this chain of thought, the evidence is clear to see even through semetic obfuscation.