He's been pretty closed-mouthed about his fantasies, right? I think you just found one.
(Or maybe I'm talking about myself again...)
I just don't know. Could it really be? I don't think he'd EVER want that to be reality but it's fantasy we are talking about here. I think when anyone thinks of their spouse being with someone else, it does make you feel possessive and gets those juices flowing. I'm fascinated this is actually working for him though. He was more horny yesterday than I've ever seen him.
LFL
He knows on an intellectual level that it wouldn't be a good idea to encourage it, but he's unbelievably turned on at the thought of it. He didn't react as angrily at your past indiscretions as you thought he should. And he *&$#ed you silly after you told him you wanted to jump the fence again.
Yep, I'd say you found one of his buttons. I'm not sure how much you could or would push that particular one, even through fantasy, but it might be a good opening to try the "radical honesty" route and tell him what you've noticed and see what he says. Especially now that you're still enjoying the glow from your New Year's fireworks and have a better mindset to have conversations like that with him.
a fine and enviable madness, this delusion that all questions have answers, and nothing is beyond the reach of a strong left arm.