First of all, it's not a erotic movie. It may have scenes like that but it's the day to day activity in a couple's life. To be precise, the director tells this tale basing on people's personality which maybe cruel at one time, trying to exploit you or they're just wearing a mask so that they can hide their real self. It is very intriguing and teaching us a lesson to be very careful before we decide to do something. A must watch movie for thriller fans.