Steamy 'Fifty Shades of Grey' trailer released

Even if you've never touched a copy of E. L. James' "Fifty Shades of Grey," you probably know why the upcoming movie will be anything but family-friendly.

The new trailer, released July 24, starts out teasing it as a cute romance flick, then --predictably-- gets steamy.

The story centers around the sex life of a literature student and a young entrepreneur. The erotic love affair gave way to the fastest-selling paperback of all time, which is being made into a film staring Dakota Johnson as Anastasia Steele and Jamie Dornan as Christian Grey. Take a look at some scenes from the trailer.

It starts out like a lot of romance movies: boy meets girl. They obviously have chemistry.

Anatasia's voice can be heard describing her first impressions of Christian: "He was polite, intense, smart...really intimidating."

The pair start spending more time together, and Anastasia gets a taste of Christian's successful, "controlled" lifestyle.

Things get heated, but it's still pretty tame.

Then Christian warns Anastasia, "You should steer clear of me. I don't do romance."

Anastasia doesn't lose interest, and we'll leave you to guess what follows.

Here's the full trailer here.

(Warning: contains sexual content)

The film is set for a Valentine's Day 2015 release. Do you plan on seeing it? Let us know in the comments.