That's always a good question and deserves a good answer.
I hope I'll be able to provide one.
Here you go: The first time I thought of making a C/S page was when I started searching the web for fictions about out glorious couple and I found that there were only homepages of the authors but no archive. And since I've always wanted to build a page about a shipper couple it was an easy decision for me to start Naked Truth.
But the most important point is that it's factual that there is this subtext between Catherine and Sara. Even if I was the only one who noticed it I would've started this site just to show other people how blind they've been. If you're one of them, browse this site and then re-watch your CSI tapes. I'm sure you'll find what I'm talking about.