What the heck is it supposed to be based on?
That's what I've never understood.

But he SO CLEARLY strives to keep people at a distance, to the point where he gets really freaked out and confused when people flirt back. I don't believe that he's had sex with anybody in Atlantis except for Rodney, I really don't.
Exactly. There so many things that just don't fit.

So yes, I would really really like it if someone wrote something to explain why Sheppard is willing to start things with these women and then call it off prior to the actual act.
Do you mind if I let this percolate and see if anything come of it? I seem to be at loose ends right now anyway...