To titillate or not to titillate. That is the question and the defining line between an 18 and a sex-club R-18: whether the intention is titillation. Thus many arthouse films can escape the harsher certificate. Case in point: 9 SONGS is the story of a brief intense relationship between a hetero couple who alternate copulation with indie band concert-going. Despite the real sex it was released uncut with an 18, leaving shattered taboos in its wake.