Yuuri always gets a little knocked offline from his orgasms. Sometimes it's more intense than others, but he's always at least a little spacey afterwards, like the release of tension leaves him giddy a bit. The more intense version can leave him limp on the bed, trying to remember how his limbs work. He's ended up as deadweight on top of Viktor more than once, probably actually scared him at least once with how still and quiet he's gone.

He's just sort of figuring out how to focus his eyes when Viktor pulls back a little and drapes it down Yuuri's neck. The feel of the fabric in contrast to Viktor's skin draws a low noise of appreciation out of him, involuntarily, and he hums a little more appreciatively when Viktor curls into him.

He makes the extra effort to wind his arms around Viktor's neck, to lean into him, but even though he's not really sliding towards sleep or anything, it's about all he can manage at the moment.