I think you need to dig deeper.
Not on what to label it. But what you can learn about yourself here that will provide clarity and when you grasp those things I think the conversation will change and become more productive.
You have mentioned sexual abuse. Same here, and I get that it sexualizes you in a way that you can overshare and be inappropriate.
One thing that is common, at least it’s true for me is that sexual abuse teaches you to get attention with your sexuality. There is often this confusion between enjoying attention through the grooming process and just dealing with the unwanted escalation. It makes us feel complicit in some way. For me, it taught me sex is a tool to get attention and validation.
In having an affair I allowed that need to escalate until a physical relationship because I was in a place in my life that need for validation was heavy enough that I traded for it to keep it going. Not consciously, some of that was hidden from myself.
You may have had this interaction without that need being so strong that you had to turn it into an emotional or sexual relationship, but you were getting something out of it that likey goes beyond having curiousity. I believe you may not have been genuinely into this guy, but I think you need to reflect more deeply at the emotional pay offs you were seeking and receiving.
For example, I am sure he showed you a lot more interest due to the subject matter because that was going straight into his spank bank. And I do believe that may not have been a concern of yours because you were not planning on anything with him, you were getting what you needed from the situation without having to.
The part that I think you need to reconcile is how you could be sexually abused and not learn the nature of that objectification? I say that because you say you didn’t realize he was sexualizing you. I am not asking you to defend against that here- I am asking you to self reflect and hold that as a question. Because I think there are aspects to this you have hidden to yourself or are minimizing.
If your husband was having these conversations with another woman he would likely not be able to do that without having list involved or as a primary motivating factor. So I think he may be projecting that somewhat as well.
But, In general people get turned on when talking about erotic things. I sort of wonder if you have some exhibitionist part of you that maybe sees this man as your passive audience? The turn on isn’t with him, or about him, it’s the indecent exposure of some of your most innermost sexual thoughts.
In some ways, isn’t that a little like reliving some parts of your sexual abuse? You likely were not interested at all in your predator past the attention point, but that person still had the indecent exposure of things that are private and intimate.
And maybe I don’t have this all right, there aren’t enough details for me to clearly know what it is or was, but I am throwing out some things to evaluate. It’s not uncommon for female ws here to say they can see elements of reverting back to that experience of abuse and seeing some of that be evident in their affair.
But, I think if you find the clearer answers the ones that are fully true and start thinking about protecting that little girl from having that exposure, what it would feel like to have been able to maintain your innocence, your line on that boundary will start to slowly move and you may see it from your husbands perspective more.
I don’t think it matters what you call it, there is a problem here that you need to figure it out and it runs deeper than simply I liked to talk about sex with the guy to learn more about sex. This is where your husband is disturbed.
You know your husbands drive towards sex. We as females are brought up being told guys only want one thing as a means of trying to protect our chastity. I am sorry I am just not completely buying you didn’t know the guy was sexualizing it. I think you may not have cared either way because I believe you didn’t want him. But there was a payoff here you did want and it simply was something you chose not to acknowledge, just like you didn’t want to acknowledge he might get turned on by it.
When people are in a situation like this where they overlook what they don’t want to see to do the thing they want, that’s when you need to figure out why.
If you can do that and identify what those needs are or what the dysfunction might be you can start to heal the wound that caused it. And by doing that investigation and fixing the why you can begin building trust.