Mithrun stands near motionless as Sylvain gets him hard and takes him into his mouth. There are little shifts in his breathing, of course, and he makes sure to adjust his fingers in Sylvain's hair periodically. The latter is deliberate, as he tries to shift how tightly he grips Sylvain's hair with the ongoing stimulation.

He remembers that's roughly how it tended to go, anyway - but it doesn't come particularly naturally, anymore. Most reactions to sex don't tend to, unless he's really taken by surprise.

Which means that, when Sylvain looks up, it'll be to that same unenthused stare he's been getting all along, albeit with a bit more color to Mithrun's cheeks and lips as his pulse rises.