Justin Cobb is just your average, gifted, under achieving teenager… apart from the fact that he's still sucking his thumb. ‘Cured' of his habit by his dentist, Justin launches himself with gusto into the world of sex, drugs and the school debating society, effectively alienating all those he holds dearest. 'Thumbsucker' is a clever, witty and thoughtful slice of indie American cinema, helped considerably by a well impressive cast.