I don't agree that I'm behaving like a woman given the reality of my situation. We'lll just agree to disagree there.
I do appreciate the rest of the hard line you took. I needed it and it helped. I do the same to my own friends occassionally.
Q1: I told my wife the day after I received them and gave her the option of looking at them. She declined and I deleted them. So, 24 hours max.
Q2: To make her jealous and elicit some sort of emotional response. Rest of it answered in Q1.
Q3: A genuine appreciation for the attention I give, some measure of reciprocity, and a bit of enthusiasm while doing it.
Ok, let me preface this by saying this is not a troll but a serious attempt to help.
You ARE acting like a woman right now. Others have pointed out the specifics, but it boils down to making us guess what the problem is and that most of your issues with the wife boil down to wanting her to take charge and be more assertive, when it sounds like (based in the vagaries of this medium) that she is wanting the same from you. Two woman do not make a functioning relationship, which is why lesbians are always angry (Mist can confirm). Also, relationships change over time, because people change over time. You need to let this truth sink in and look at your situation more objectively, rather than emotionally. Again, more like a man. Not a criticism, because I am an emotional bitch myself over many things. But you need to recognize it and get a lid on it. Thats why I think counseling is a good idea, because you present all the symptoms of a midlife crisis and a lot of the bored housewife tropes. Again, I am not trolling. Your inability to comminicate the issue here likely is the root of your real life marriage woes and you should get some help with that. Now on to specifics:
1) A great man would have deleted them instantly and quietly told the sender "I am flattered, but I am married. Sorry ma'am". An ok man would have broken off all contact with said thot and kept the nudes in the archives to rub one out down the road when getting through a rough patch. You used the pictures to gaslight a woman you claim to respect. Not a good move.
2) Yeah, not a healthy choice and speaks to personal selfishness. This is literally shit women pull when they want to win an argument and why I keep making the point that you are acting like the woman in your marriage. This speaks to the next part.
3) She has stated that you are the woman in your marriage. You have heard the same from several of us. Consider in the fingerbang scenario you described if you had responded by saying "We'll see about that" taken charge and just driven the point home figuratively and literally. Based on what little you have given us to work with here, I feel safe in saying that she is all but begging you to take charge and be a man. If you want her appreciation and some excitement, you need to step up and do that, in my opinion. As pointed out, you already mentioned some rough stuff happens in the bedroom and that's just another signal for whats missing from her direction. Woman will never tell you exactly what they want or need. Thats life, so tough shit. But they are also not going to shower appreciation on a guy who is needy and seemingly incapable of asserting his role as the man in the house. Khane might be able to better judge and articulate this, but what you want is there if you will be a man and fucking take it.
What you have right now is a long term slow spot in your marriage because one or both of you got complacent and slipped out of their lane. Everything you have related suggests at least half of that is on you for not being assertive enough and it seems she has even given you direct statements to this effect. If you want to get the enthusiasm you had 20 years ago, then you need to be that guy again, at least for a while. But as I said, in 8-10 years when your T levels drop off this shit won't matter anymore anyhow, if you make it through this patch.
Whatever you end up doing, be upfront about it with her and everyone else. Even if you are taking a sledge hammer to your life. You might not have to live with her forever, but you do have to live with yourself.