YES! I did see him look at his running shoes and knew he was thinking of Kay. I posted about it many pages back, when I was talking to myself here!

About the scene in the forest, I have read 2 interviews who looked at it that way, one actually called it rape, which I think is ridiculous. The scene before that Marc is lifting weights - he is more than capable of getting away from Kay if he wanted to, he was not overpowered. And he was kissing him back and had his arms around him - you know he's fighting it, but you also know he really wants it.
I'm not sure about what Marc did right before that. I thought maybe he was trying to move Kay's hands away, is that it?