No, there was no sexual content in that last slow-mo walk. The feeling I got was more of: "What an ungrateful bitch! What a *beep*ing whore!"
Carter did have feelings for her. But not sexual. More platonic friendship, or affection for a former lover. Somewhere, you will always love the people you have been with, even if it is in the past. It is the kind of affection you have for a child going astray, or a sister you have been growing up with, now turned a beautiful woman, or a former lover with no sexual feelings in the now but with a past history. In short, he thought more of her. He thought she was a real woman, when, at the end, and when the goings got tough, she was just another ungrateful bitch.
"His function was to walk beside them; her walking away w/o him by her side meant he had been left behind..."
Yes. He was 'The Walker', but she was the one who walked away...
And that hand thing in the car is just a foreshadowing. Had he known better, he would have understood the clues...
The new design of the IMDb site sucks big time. Bring back the old design, now!
Yeah, I agree with a lot of the above. I think that the last scene was him finally convincing himself of what he now knew; that someone who he had thought was a soul-mate to him was in fact a coldhearted bitch. And he went there to confirm it and to have a sort of "closure" about the whole thing. And that was one of the reason that the Bacall character was so cold, she thought his need to do that was "common". But he felt it was important enough that he needed to do it. So he was actually happy as she walked away from him because it left absolutely no ambiguity about the situation. She was a total bitch and didn't have any feelings for him. And now he was free to start his new life.