Sex is a doorway to something so powerful and mystical, but movies usually depict it in a completely flat way.

Lynch contrasts sex as an experience with metaphysical depth—an opening onto the mysterious, the unconscious, and the transformative—with the way mainstream cinema often reduces it to mechanics, titillation, or plot utility. The “doorway” metaphor suggests passage into altered states: intimacy as revelation, danger, or spiritual charge. His complaint about “flat” depictions aligns with his broader aesthetic: he favors ambiguity, dream-logic, and emotional undercurrents over literal representation. Read this way, the quote is less prudish than critical of cinematic shorthand; it argues that film frequently fails to convey the psychic and symbolic intensity that sexuality can carry in lived experience.