While this scene is relatively tame in comparison to others on the list, we think it bears inclusion, considering it includes Scarlett Johansson and Penelope Cruz, two of the sexiest women on the planet. In this 2008 Woody Allen film, the adventurous American tourist Cristina (Johansson) and Penelope, who plays the explosive artist, Maria Elena, whom she ends up bunking with, wind up making out in the heat of passion while in a darkroom. Before long, they pull Juan Antonio (Bardem), Maria's ex-husband, into the mix for a quickie.