Istredd reassures him he doesn't have to say it because he really never wants that to hang over Lucifer's head. Like there is something missing because of him. He is secure in the fact Lucifer's feelings for him are real and unique. Nothing else matters above that. They have each other. They have for a long time, but there is still power in putting it into words. In acknowledging this.

He laughs because that was one of the first times he actively flirted with Lucifer, so having a callback like that right now is especially funny. Istredd pulls back to look at him, amused and playful, running fingers through his hair and ruffling it a little on purpose.

"Your bed or mine?" he teases. It's a tacit agreement that yes, if this means they share a bed now, and therefore body heat, he is all in. Sleeping will be a lot easier for both of them if they are near enough to each other for confirmation of life.