Those "50 Shades of Grey" books are definitely aimed at women.  But the movies might have something for the guys, too.  Because KELLY MARCEL (seen here), the woman who's writing the script for the first installment, is aiming for an NC-17 rating.  She says,  "It’s going to be raunchy.  We are 100% going there."

Sadly, not every sex scene can be represented in a 90-minute movie.  Marcel says, "We did go through and decide which are our favorites and which are not.  Most of them are in there, but I can’t say more than that."

Here's something else she's not saying:  She may be writing an NC-17 script, but that doesn't mean an NC-17 movie will result from it.  The STUDIO is going to decide how far the movie goes.  And as you probably know, it's hard to get NC-17 movies into theaters.  And if you don't get the "50 Shades" movie into theaters, you're saying goodbye to MASSIVE box office revenue.  What studio is going to do that?