Where there is Eden, there is usually a serpent. In this case, it is literal and metaphoric, as Paul (Matthias Schoenaerts) and Marianne (Tilda Swinton) are blissfully happy in a lovely home with a pool on an exquisite island near Sicily. Occasionally they are confronted by local wildlife, including a couple of snakes. But mostly they lie naked outdoors, make love in the pool, and go swimming, slathering mud all over each other then sleeping as it dries. Both are recovering, which means both...