Another film I liked recently was 'Love Me If You Dare'(Jeux d'enfants) -- with its crazed young protagonists, Julien and Sophie, who grow up into equally crazed lovelorn adults with an obsession for a childhood game. The best scene has the heroine (on a bet) wearing her underwear on top of her clothes for an exam. Weird as anything, but so good because their love, honest as it is, is sociopathic, as love sometimes is.
I know, my reviews are sketchy today. So am I, dear reader, so am I.