When he hands hit his stomach, he can't help the tensing of his abdominal muscles - it's a shiver, a reflex. Her hands are cold, and he's hot, even beyond the normal, in the heat of the moment and all. When she bumps the edge of it again, well, this time he's a little more distracted - the way her body just rocked back, pressure right on a part of him that's starting to beg for more attention.

That circle though, that's kind of okay. The nerves just around it are hilariously networked, some over-sensitive, some barely-sense-anything. That smile is beautiful, and he answers it with one of his own, sitting up enough to facilitate removing the article in the way.