Glad that D is feeling better. I have thought about "forgetting" to put my rings on. Might be interesting to see the reaction, yes. You should look at the little things. It sounds like he was trying to be sure that you were going to be safe when he locked the door, correct? Not knowing the exact sitch, I'm assuming. If so, that's thoughtful. Sounds like a tiny 180 for him.
CFB - my mind is thinking really bad things right now, but probably appropriate
I wouldn't expect a reaction from your H. I took my rings off out of anger when the bomb hit and put them w/ all my jewelry from H on his dresser. H never said a thing and I put the rings back on. After H decided to move out I took them off for a week because I thought it was like lying. Again no reaction. I put them back on because I'm still committed to the M. Like Jenny said, do what feels right to you. I wouldn't do it just to see if it pushes H's buttons, it could backfire.