Oh, wow - you've done the wonderful thing that comes in the best of fics - you've made them into rich and real people. I love that there are so many issues layered into this and that both Dean and Seamus are sliding over a dozen different razors all at once and don't even notice and have to fight just to identify what they think they are doing and thinking and I love that they have been together enough to make a language of their own that seems true to their own personal relationship. This is not a story that could have been pasted on top of any random other pairing.