There's a lot to be said for watching a movie on the big screen — the hum of the projector, the collective experience of being in an audience, the sticky floors — but there are also certain films best enjoyed in the privacy of one's own home. Films that require freeze frames, slow-motion, repeat performances or some carefully calibrated combination of the three. Premiere has cherry-picked 20 provocative movies for your home-viewing pleasure, highlighting each one's most titillating sex scene.