According to Osho, your lingering obsession comes from negative attachment created by years of control and repression. Saying “no” binds you more deeply than a naïve “yes.” Unlived experience keeps desire fresh and rooted in the unconscious. Drop resistance, meet sex consciously as a simple biological phenomenon, and let direct experience and awareness deglamorize it; then its fascination naturally withers without guilt, fear, or forced discipline.
Fighting sex makes it stronger; allow aware, natural experience and the craving will fade on its own.