Because for me, love and sex don't mix. I've tried to make it work and it's just not possible. Sure, women secrete chemicals that make them FEEL for the person they sleep with. And inevitably intimacy is something that comes with both sex and love; but really, they're two completely different things, and in my opinion, they should be kept as such.
Let's take Oscar Winner Tilda Swinton for example: bitch lives with a man she's been with for years AND a sexy 20-something Latin boytoy. She will never have her heart broken, because she has love in one man and sex in another. If we all could operate that way, the world would be so much happier; but we can't, because most people are jealous, and angsty, and self-righteous.
I, myself, am slowly becoming more and more wary of relationships, but not of sex. If Swinton's situation isn't possible, perhaps I'll reemerge as SATC's Samantha; or at least Carrie when she wasn't fretting over Mr. Big's emotional unavailability or Berger breaking up with her on a post-it. Fuck. I hate how all talks of relationships immediately collapse into an analysis of Sex and the City.