Here's what I ended up writing as a review in another section of the eGO forums.
D.T.S.'s thoughts on Dragon Age: Origins
As for being put off by the option to have sex in the game, I wouldn't worry about it too much.
Try the game anyway. Once you play it, and see how organically the characters interact you'll probably realize it wasn't some "omg boobz" marketing ploy. It actually works, and as many have mentioned is only something you end up doing if that's what you're really pushing for.
If it still bothers you after that then either...
A) You might not be M enough for this M rating
or
B) Hopefully you don't know anyone that's dating/married/in their mid-teens to early eighties/usually getting drunk at a college party.
I'm exaggerating there, just to get you to play a game I'm 99.9% certain that you'll really enjoy. In all seriousness, once you play the game you'll be able to see that it's not some GTA-style Hot Coffee porn romp.
And to be quite honest....the relationships flow so smoothly, and you get to make so many other choices that it might actually be really, really weird if you didn't get the option to sack up with someone if you really wanted to.
It actually fits in well, and it's definitely not what you'll look back on and remember about the game.
Not like some gratuitous female shower scenes in anime films. I mean, seriously. What's up with that?