One for the guys

My husband found out I kissed another guy a few years ago. I offered to tell him who, when, where and why. He was not interested. What does that mean? I mean if the tables were turned I would want to know. He wasn’t even that angry just a little hurt. Why wouldn’t he want to know? I figure he either has cheated himself, he just really doesn’t care or it’s just hurtful to talk about.