>Can someone tell me what his thinking process might be?

I doubt it, but the one thing you didn't mention in all this is whether you've talked to him about it. If so, what did he say?

I'd think most of us would find this unfulfilling, but I also know that by now, I would have addressed it. In one sense, 2 years is a pretty long time, but in a larger sense, it's still part of the honeymoon phase. This reads like 2 people in their 60s!