OK, so "Mr. and Mrs. Smith" may not be super heavy on whips and chains, but what it lacks in props, it makes up for in pure sex. The movie is about a bored married couple — Brad Pitt and Angelina Jolie — who discover that they are both actually assassins working for different companies — and they are hired to kill each other. The sexual tension is tangible throughout the movie, both with the characters and the actors who play them, and we all know that it translated to real life between Pitt and Jolie (even if that ended up not quite so well for them years later).