she leans into him and says "Did I ever thank you for saving my life?" and then leans even closer and whispers "Don't you wish I would?" Hot like burning;

You are not wrong. That scene is ridiculously hot, honestly. (And I'm so amazed that as soon as you mentioned it, I remembered it very, very clearly. It clearly made an impact on me when I first saw it.)

I like Bewitched, Bothered and Bewildered quite a lot.

Oh, that is a great episode! So much fun and Xander really gets a chance to shine.