I'll be honest, I was having trouble keeping my attention on the episode, but I had a lot of feelings about Cas's sex scene, and none of them were particularly sexual. It was (for me) more about the wonder of what it's like to be human, and him feeling the kindness of someone reaching out to him when he needed it. Which made me very, very sad for him, given the way the episode played out! I was really touched by the way he acted in the afterglow. This was a terrible episode in many ways, but most of the Cas stuff worked better than it should have because of the way Misha played it. JMO.