Re: Happily married and considering an affair
If your marriage is as good as you say, and you still want to pursue variety, you will SHARE this idea with your husband and work it out with him involved.
There are two options most people who pursue this follow if they value their relationship. a) swinging, and b) open marriage. (Of course, there is always the option of doing nothing, or spicing things up with your spouse.)
Of the two, the first is the "safer" option as you do it together, so no secrets, no fault. It's still risky, but you both take it together. Option b) can work, but has far more risks both individually and for you as a couple. You'd both have to agree on doing this, and set your ground rules. In your situation, I strongly recommend against it, since you are willing to break you current relationship rules.