J smiles, almost smirks, though being pleased with himself is secondary to leaning in for another kiss. Now that he has tacit permission to do so, he sees no reason to resist the urge. Just because S has been okay with it in the past doesn't mean he'd be in the mood to kiss now, but since he is, J is perfectly happy to oblige.

Besides, now he's thinking about S on his knees, and kissing him, even lightly, serves as a brief distraction. "I'll try harder next time," he teases. It's nice to think about — not so much as something he wants to do immediately, his jaw already feeling a little sore, but just the idea that there's going to be a next time. They're here, together. Somehow, in spite of the odds, in spite of everything — impossibly, somehow, they're here and they'll have time now.

His tone turns soft when he speaks again. "You don't have to, you know. It's okay." As badly as he'd like to feel S's lips wrapped around him now that the offer is out there, he's not going to insist. There will be other opportunities. While his hand — or even S's — isn't quite as satisfying, it would still be enough to get the job done, and he's not about to make S stay upright any longer than he needs or wants to be. Granted, he knows that look in S's eyes well enough to be pretty sure he's just going to go for it anyway, but J knows he'd feel bad if he didn't at least offer S an out.