The Key (2014)

What if you could get an intimate look into the mind of your spouse while you were having sex? What does she feel, what does she like, how does she think? That's what happens to Jack (David Arquette) and Ida (Bai Ling) in The Key (2014), when a husband who is obsessed with his wife starts a journal solely about their sex life. He leaves the journal in a locked drawer—but leaves the key in the lock so his wife can read it whenever she wants. Ida, who is relatively unattracted to her husband, starts a journal of her own on her computer and leaves it for Jack to read, too, and their sex life becomes increasingly kinky as time goes by.  An adaption of a Japanese novel by the same name, it features Bai Ling in her No. 1 nude scenes, giving us the key to her boobs, butt, and bush multiple times as her husband photographs and films her! Bai Ling's bod is shown off in so many super erotic poses, you're going to need to lock it back in your pants!