Oh, he likes this, and he likes that it's Tony he's kissing. He can't really tell what Tony's doing in so many terms -- the way he's guiding the Hulk, easing him into it -- but he does feel its effects, and they comfort him. He could stay like this with Tony, in the woods where it's quiet (at the moment) and they're alone (for the moment), but he isn't lonely.

He's content, at peace.

And the lightheadedness swells until he feels pushed off balance, and he breaks out of the kiss dazedly. No. No, it's not fair. He doesn't have the ability to speak to tell Tony what's happening, but he has time for one more sad, fond look, and he strokes his back lightly, before he blinks slowly once, twice. The Hulk's body goes limp, and he lies back, eyes closed and breathing even.