According to Osho, sex is fundamentally a biological release valve: the discharge of energy relaxes bodily and mental tension, which we then mislabel as a 'great experience.' The more tension, the stronger the sexual urge; the more relaxed, the less necessary sex becomes. True experiential transformation arises through other means, not sex; intercourse, at best, functions as technique without intrinsic experiential depth.
Sex mostly lets your body blow off steam, and the nice feeling is just relaxation; if you’re calmer inside, you won’t feel such a big need for it.