Look, Yuuri may or may not ever get to the point where he can actually manage to say anything explicit except at when he's been brought completely out of his mind, but he's a pretty fast study about flirting, actually. He stretches just a little, matches the tone,

"Mm. Just back in bed," he manages to hit the perfect balance between making it sound like he means he could sleep the rest of the day and that they should have sex the rest of the day. "Though we should probably get some of my clothes clean at some point so we can go shopping for dinner. I have to return the favor," he indicates the breakfast he's still working his way through.