It's hard not to jump when Damon moves that close that quickly and even if Jowan assures himself that Damon wouldn't hurt him, he still leans away a little, arms drawing just a little closer to his body defensively.

But the anger and frustration in Damon's words at least he can understand more, can realise that it's not really directed at him, and as Jowan glances back past Damon at the destruction he's been causing, he can remember as well that... well. Anders did tell him that the mansion repaired itself? And the wardrobes can make seemingly anything too, so Damon isn't really causing any lasting harm this way.

So when he looks back at the other man, he's still a little hesitant but hopeful. "...did you want some help? I could start some fires or cover things in ice or something?" And remembering as well how he'd felt after everything with Lily, he cautiously offers: "Or we could see how much alcohol we can get from the wardrobes?"