[He does take a moment to clean up his workspace, and then another to clean up himself. Wash his face and brush his teeth and draw a deep breath in private. It's frustrating, how often he feels like he's starting to get the hang of something and then the smallest thing comes back to remind him that he doesn't really know at all. It's not just insecurity or inexperience, it's a deep not knowing and if it's one thing that makes Reid uneasy it's that.
Not being great with social interaction is okay when you don't have to do it a lot, but here you practically have to do it all the time and most of all he's starting to enjoy it. It's still weird and awkward and he's still not very good at it, but he thought he might be getting better and then... this. A small, insignificant event and it still scares him because for a moment he doubted himself. Doubted he could really do this.
She's so good to him. That's the scariest thing of them all.
Eventually he does pull himself together enough to join her in the bedroom, pausing briefly by the door to look at her there in his bed. So good to him and so pretty and how did he ever end up here? How in the world did he get this lucky?]