He leans back with a quiet sound, feeling his heart beating close to Neil's wrist, pulse to pulse. He had thought it might be difficult, coming back from that, but even now he doesn't think he would want that heart to ever stop beating.

"I want to," he breathes. "There's things that... I don't know if I can." He stares at his own reflection in the darkened glass, at Neil's, thrown into shadow.

"I gave you that muzzle. You have the collar. Maybe you should use them."