Regret - The easy answer is that I suspect that before you embarked upon an A you had told yourself you would "never" have an A... yet here you are.
The longer one is that I see wayward thinking & behaviors as something that will always be within the realm of possibility. Maybe it's reading the books and SI, but we all seems to be capable of having an A. And there are studies (granted, take with a grain of salt) indicating that once someone is able to walk the path of an A (esp PA), there is a statistically significant greater likelihood of doing it again. Anecdotally, we see it here on SI with reasonable frequency (there seemed to be a rash of repeat A's by WS several months back). We also see in SI (and in the plethora of infidelity books) a pretty regular rash of folks who take their As underground, despite being "in R" (aka false R).
I also see all the thinking that starts an A as identical to alcoholism or any other addiction (even if the WS is not an SA). IOW, the first lies you tell are to yourself, and then follows with lies to everyone else. Then, a WS continues to engage in harmful and hurtful behaviors, KNOWING that it will devastate their BS, KNOWING it is wrong, etc. That is classic addictive thinking. SO - when I hear any WS (and as I approach the 2yr mark from dday, I really apply it to anyone) say they will "never" do it again, it strikes me as someone still in a wayward mindset.
In the last several months I've had to change my own "never" on this front. I consider myself as close to "never" as a person can be, mostly bc I really tried to have an RA (alone with a man who I found attractive & who had propositioned me, in a conference hotel room, brainpower fully diminished with lots of alcohol), but I just couldn't do it. I'd had plenty of opportunity before dday as well, and never even considered it (in fact, i'd call my husband when someone hit on me). So I figure if I couldn't do it at the height of rage and justification, I will likely never have an A, but "likely" is not the same as "damn sure".
So, that's why any WS (or pretty much anyone) who says they will "never", it strikes me as a person who hasn't really worked through the whys and fixing, etc. Because if they have, they would recognize that they are absolutely capable of having an A, and that they are susceptible to the lies they tell themselves.
This is not meant as a 2x4, just an explanation of my thoughts on the issue.
RegretItAll - I want to say this as gently as possible, as I believe you truly want to change, to heal, etc. Your posts have a bit of a ring of defensiveness to them. I'm not trying to bash you here. I'm not suggesting that you are not sincere in your desire. But I am suggesting that you may not quite yet "get it" or "own it".
Now, the original post in this thread kind of shows that you are having these breakthroughs, which strike me as positive (eg "I realized today that I did subconsciously go looking for an affair" ). But then I see things like "So we still disagree a lot about what is truth or lies". On this front, the "truth" may not be so relevant as what your BS FEELS. I think this is really hard for a WS to understand (my WH sure as heck does NOT understand, but many WS who post on SI seem to totally get it).
Here's an example from my own life - and to show that even as a BS I don't always "get it". In a recent joint session with our IC, my daughter was asked to give an example of my acting in a way that hurt her. She talked about how I yelled at her all the time about her grades. Where did my head go? It immediately went to the fact that I was NEVER the one who focused on or talked to her about her grades. It was her dad that would check her homework online, and ask her about / go through each & every assignment, pretty much every single day. He did not yell (at least not that I recall), but he was constantly hounding her about it (and he has confirmed that was the case & that I am not just making stuff up to avoid taking responsibility).
But here's where I completely f*cked up. Instead of validating her feelings (of shame, of feeling devalued, of never feeling "enough" in the eyes of her mom), I said "it was your dad that was always on you about your grades" . About the stupidest thing I could have done. I knew better, and I'm demanding this of my WH, and yet.... I got defensive. I minimized her pain. What I SHOULD have said was how sorry I am that she went through that, that I understand how feeling constantly criticized about her grades would lead to her feelings of not being enough, and feeling invisible. I should have validated her feelings in a radically genuine way and EMPATHIZED with her by communicating my understanding of her feelings. Not because it's the "truth" that I nagged her about school, but because that is what she needs (and Lord knows there are plenty of other things I f*cked up, even if it wasn't THIS particular thing). Because I love her and want to support HER healing. Instead, I supported myself and covered MY ass, basically leaving her all alone (again). It was a harsh lesson for me, but much much worse for HER to feel that I can't be there for her - esp when she is being vulnerable by sharing that with me. The good news is that I recognized it right away (bad news is this was the end of the session, so we didn't really have time to flesh out how hurtful I was to her in that exchange- it's first up for next time).
So - that turned out to be a much longer post than I expected. My point is that quibbling over the truth is not really important. Validation and empathy are what's important. What difference does it make if you don't remember which account you used to send emails? What MATTERS is that your BH is devastated that you sent emails at all (which you allude to in your post). As a BS, what I want to hear is "I'm so sorry that you feel so bad. I'm so sorry that my behavior has traumatized you to the point where you - understandably - cannot trust what I have said in the past or in the present." And "I'm so sorry that my deception has caused you to feel like a babysitter". When he says he has no doubt that you will cheat again, is it possible to take a moment (ie don't do the stupid thing I did) and a few breaths and say "I'm so sorry you feel that way. I am so sorry I shattered all of your trust in me. I will do all that I can to fix what caused me to hurt you, and become a safe partner for you". That is what I - as a BS -need.
Have you read "how to help your spouse heal from your affair"? I'm told it can be found in a pdf for free online. Even though I'm the BS, sounds like I'm due to read it again. If you have read it, you might consider reading it again - I've read it several times in the past 2 years, as I really do believe that the principles are lessons for everyone (WS, BS, or those who have had the good fortune to never be touched by infidelity).
[This message edited by gmc94 at 6:41 PM, December 16th, 2019 (Monday)]