Experience Threshold
The postmodern paradigm confronts experience as the ultimate raison d'etre. It eschew objective truth and hierarchy, believing the latter to be a form of endless subordination in the form of order and structure. If there is an objective truth, that must mean there is an equivalent untruth, which means one of those concepts have diminished intrinsic value relative to the other. This is an opposing perspective, and therefore with postmodernism, there exists no hierarchy, no structure, and no objective truth. There exists only the pursuit of multi and varied experiences (travel, food, video games, movies, sex).
Hellraiser posits an interesting question, mainly regarding experience. If the main character's sensory experiences have been dulled through overexposure to the full spectrum of experience (eroticism, drugs, traveling and excitement), then how does one fulfill the perennial desire to feel good?
Frank has experienced the full spectrum of experience. He is quoted as saying, "I thought I had gone to the limits, but I hadn't. The cenobites gave me an experience beyond limits. Pain and pleasure. Indivisible." The idea that there is no objectivity (higher God or higher purpose), and that the point of life is to just feel, gather experience, or find your own meaning, leads Frank towards Hell. The cenobites grant him, much like the devil grants those who follow him, endless desire, unadulterated and without limits. Frank eschews objectivity (sleeping with brother's wife, wanting to rape Kirsty). He lives only for his own subjective experience, and views the experience itself as virtuous, independent of means of acquisition.
As he finds Hell, he transcends the experience threshold, reaching a state of ecstasy. The final scene where Frank is torn to pieces is similar to the old practice of lingchi, where victims die of a thousand cuts. There are photos of individuals who, despite their torture, are seen smiling and in a state of bliss.
The final scene embodies the transcendence of experience, culminating in the ultimate orgasm. When Frank says, "Jesus wept," we see his experience as reaching the polar extreme of asceticism, indulging in the ultimate form of hedonism. It is seen as a sacred moment, the culmination of taboo and pleasure.