Infidelity Support Group
Any relationship in which one partner engages willfully in sexual relations with another outside of the partnership is considered to have experienced infidelity. This breach of trust is often traumatizing for the faithful partner as well as the relationship, and support is often needed to heal emotionally and to decide whether or not the relationship should continue after...
(Sorry, feeling a little snarky today.)
However, maybe if I copied it and sent it as a FB message from the OW then he'd read it!
Desires tend to rise if we are not self-aware, and latch onto us. It appears "innocent" at first, but can quickly snowball if not halted. The more they give in, the stronger the desire becomes and the harder it is to deny it.
Like my W. In 2010 before her affair started, she enjoyed men's attention. She'd lost weight three years prior, and she began to "feel" sexier. One man latched onto that and started flirting. She enjoyed the attention, and convinced herself it was just an innocent game (despite me telling her it wasn't and she shouldn't be flirting with other men). But her desire for that attention caused her to ignore my warnings, ignore the boundary she was crossing.
When the man began to sex-text her, she felt a rush, and a strong desire kicked in, because someone besides me *wanted* her. Big ego stroke for someone wanting attention. She stopped talking about the man to me and it went underground. But in her mind, she still justified it as an innocent game. The fact she was having an inappropriate relationship with another man, hurting me and our marriage, didn't register on her radar. Indeed, up until the moment she gave in to the guys demand for a BJ, she didn't feel she was doing anything wrong. But by that time, her thinking was so screwed up because of her highly irrational desire for this man, that it would have taken a huge 2x4 to the head to even begin to realize she was enslaved to her passions, and risking her marriage and family to satisfy them.
One frustration I've had is how to break through to someone in the fog like that. Reasoning doesn't seem to work. They are making decisions from an emotional center, not a rational one. Which is probably why your H said that. He knew his mind was in the place that he felt justified at the time for what he was doing. Any sincere apology would have burst the fantasy bubble, so one given wouldn't have been out of sincere regret, but to get you off their backs so they can continue to do what they want.
One of my definitions of when affairs happen: when temptation meets opportunity and low self-esteem.
Self-esteem: Infidelity's Biggest Trigger
http://healinginfidelity.blogspot.com/2013/09/self-esteem-infidelitys-biggest-trigger.html
The Path to Self-Esteem
http://healinginfidelity.blogspot.com/2013/10/the-path-to-self-esteem.html
Individual counseling to help him evaluate and establish those might help as well.
But you are right. The temptation is for him to just assume he'll not do it again, promise to himself and you he'll never let it happen again. But unless he's proactive in dealing with it, the likelihood he'll stick with it, despite best intentions, is low. When that desire kicks in again, he's got to have trained himself enough to see it for what it is, and run away instead of toward it.