How many married people feel a sexual attraction for someone else during the course of their marriage? I don’t have an answer, but I’d bet it’s a majority, even if it was only a one-time event. (And if you included movie stars and other celebrities, then it would be even higher.) Of course you’re talking about an entire category rather than a specific person, but really, that doesn’t change anything. If you want to stay married, then this is a temptation you have to avoid. Now if you told me that you were no longer attracted to your husband and that the only way you could achieve sexual satisfaction was to fantasize about having sex with a woman, I might tell you to go to a counselor who specializes in gender identification to decide whether or not you are a lesbian. If you were, then you might decide to leave your marriage, though that wouldn’t be a certainty even then. But merely feeling a sexual attraction doesn’t give you the right to experiment, or at least I’m certainly not going to give you my blessings, if that was what you were looking for.