"I'm fine." Lying on automatic, partly because it's nothing that won't heal and partly because his attention's elsewhere. He can feel the tension fairly radiating off Spike and, while he's aware that at least some of it is almost certainly down to certain happenings the a couple of days ago, some of it must also be due to the blood dripping from his arm and splatting on the floor. He wonders if Spike too is getting flashes of another occasion when he was bleeding onto the ground, also in the dark, also with Spike watching him hungrily.
How things have changed between them since then!
He watches Spike for a long moment as he strips off his shirt and starts to twist it into a makeshift bandage, studying that demonic face and seeing a different man to the one he once knew. A man who's obviously lusting after that blood dripping from his arm, but who this time reigns himself in - who doesn't even make one wry comment or taunt about it.
It's enough to make him eventually drop the shirt and hold out his arm instead, offering it to Spike. There are deep gouges running down it, only just starting to heal up, the blood flow just starting to slow. "Want some?" he offers, blue eyes intent on Spike's face.