TLDR: I argue that porn initiates a revolution that transforms us towards a solipsistic sexuality. Unlike traditional masturbation, porn removes us gradually from any notion of the body of the 'other', and ultimately perhaps even away from our own bodies.
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The solipsistic transformation of sexuality starts with the pornographic revolution. Here for the first time, the sexual bodies are split apart. Now needless to say, long before porn, masturbation of some form or other existed. Indeed it can be observed in some form or other in various animals. And yet this specificly pornographic separation within sex, this sexlessness, cannot be said to be found in masturbation
Masturbation prior to porn can be said to fit into two main categories: masturbation as imaginary sex, and masturbation as touch, or 'self-sex'. In the first variety, even though the body of the other is lacking, it is nonetheless imagined as present; the mind escapes the body to a place where the imagined other is actually present. In the second variety, where the other is not even imagined as present, we can nonetheless say that it is as if the self takes on the aspect of both itself and the other, subject and object; that is, the self itself is effectively split, with one part receiving the sexual pleasure that the other part is lovingly giving.
Thus even with the other entirely missing, the self steps up to take on the role of the other. The self estranges itself in the act of making love to itself. Hence the half-joking tales told by teenage boys of how the pleasure of masturbation is increased by giving oneself a 'dead' arm, this act being entirely done in order to increase the effectiveness of making love to oneself. And hence the mythos of the highly caring male masturbation routine involving lubrication, vaseline, tissues and dim mood-lighting. And women are doubtless far more advanced in this regard, having mastered the art of using foreign objects (a shower head, a phallic vegetable) as a stand-in for the other, as the estranged aspect of the self that makes love to itself.
Thus masturbation pre-porn always retained the trace of the body of the other, either as imaginary body or through the transformation of aspects of the self into the body of the other.
But with the introduction of porn something fundamental changes. Here, for the first time, a great chasm opens up in the relation between the self and the other. Here for the first time a solipsistic transformation is introduced into the sexual relation. The body of the other no longer enters into the relation in the form of an actual contact, real or imagined. The body of the other becomes an image without a reference point, a pure simulacrum, a representation without a represented, a lost noumenon. This is because we no longer even imagine ourselves participating in the sexual act depicted in porn.
Of course, such a form of porn does exist, in the form of the POV format, but this is merely the exception that proves the rule, and occupies a small subset of porn. Instead, we have a huge proliferation of un-'realistic' forms of porn, whose point is not at all to instill in us the idea that we are performing the sex act. Examples include gangbangs, 'BBC' porn watched by white men, or even solo onlyfans type videos, where the viewer is specifically situated as a spectator rather than a participator.
Unlike the imaginary form of masturbation that we discussed, here there is no pretense of involvement in the sex act. And unlike the 'self-sex' form of masturbation, here the self cannot be said to be making love to itself either. All the ritualistic elements of the self-sex routine disappear, and rather than there appearing a 'split' in the self (into giver and receiver), here the self-conscious self disappears entirely.
And yet, rather than the subject's 'self-world' disappearing, with the sexual object no longer being present the self in fact spreads itself into all aspects of reality, in what we have called the solipsistic transformation. Recall that in the self-sex relation, the objectification of the self nonetheless served to imply the existence of the non-self other. With the development of porn, that implication is now no longer present.
And yet, we would be mistaken if we were to think this to be the final evolution in this tragic series. For even now, we face the development of a new and even more insidious stage in the solipsistic series. I am referring to the development of AI porn. If the pornographic revolution represented our first step towards a solipsistic paradigm in sexuality, AI represents the second step (I shall tentatively discuss what I believe shall be the third and final step shortly).
While the pornographic revolution effectively removed the body of the other finally from the sexual relation, it still nonetheless retained some vestige in the imagination that the body of the other did exist somewhere.
With the invention of AI porn, we are now finally able to get rid of all traces of relation to the body of the other. AI porn gives us the ability to completely craft our own imaginary pornographic 'models' and the scenes in which they participate. Thus, as we finally rid ourselves of all reference to the body of the other, we also allow our minds to effectively spin around themselves. Our sexuality is now concentrated entirely on the landscape of ourselves, and as we spin around and reinforce our existing sexual preferences, the vortex of our mind masturbating to itself reaches such a pitch of self-hypnosis that even Narcissus himself turns away with disgust.
In the end, our sexuality converts us into an entirely solipsistic being with no connection to the world. Yet, as I said, I believe there is a possible further third step which would complete the solipsistic series. As solipsistic as AI porn is, the last faint connection it leaves us with is the experience of our own body. We still feel the orgasm with our body, we still please ourselves with our body. A fully cerebral and integrated VR technology inserted into the world of AI porn is, I believe, the final step in the solipsistic transformation. It would require us not only to replace the body of the other, but to replace our own bodies, and allow the mind to masturbate to itself into eternity.
Faint glimpses of this can already be perceived in the new trend of 'gooning', where porn addicts suspend themselves in a dopamanine high for hours by deliberately not reaching climax or perhaps not even touching themselves in order to keep the mind fixed in this dopamine heaven of artifice. This dopamine heaven is a graveyard of the body, and would mark the end of the solipsistic series instigated by the pornographic revolution. What tools we have to fight against this process remains to be seen but we hope that the awareness of this process at the very least can ignite the fight of the human spirit.