[Gai does return that kiss, though it's notably lacking in passion compared to just a few moments earlier. It's... okay, it's a logical thought to have, yes, but that's exactly the problem. It's far too logical a train of thought for something as emotional as sex, and to be honest, Gai isn't sure it's a train of thought he wants to ever be on.

His life is over. It's all done. Whatever may become of him in countless other universes doesn't really matter-- never did really matter, because he wouldn't know about it. He could've lived his entire life here without that knowledge and been perfectly content.

But now it's in his mind, and now he's thinking about it, and the more he does so, the faster his arousal dies.]

I don't give a damn about other universes or other versions of us or anything like that. None of them matter. The only thing that matters is the you and me who are right here, right now.