"I haven't the slightest idea, unless one of us was exhibiting signs of sobriety." Which seems incredibly unlikely, given the way his head is swimming. Obviously that feeling is exactly why he keeps his arm tight around her; they're keeping themselves upright in a world that somewhat resembles a carousel at the moment.

He doesn't have such an excellent excuse for why, when she leans up and kisses him, he not only kisses her back, but shifts his grip so he can lift her just a little higher as he leans against the post of his bed. But then, why does he need an excuse? It's not the first time this has happened. It won't be the last, and as the fingers of one hand thread into her tousled hair and fist there, he's very glad of that fact. It would be a sacrifice to give this up.