I'm in a healthy stable relationship with a wonderful man but lately all i can think about is having sex with other women. I want to introduce this idea to my partner but I don't know how he would react?

You never know how someone is going to react to this. Even thought you think you know them they might surprise you in a good way or a very bad way or even somewhere in-between.

First off, it has been my experience in life to say to you sometimes fantasies are best left as them. The reason is that in your mind you can control everything, in real life you have no control over the situation.

The deepest darkest desires we have are sometimes best left were they are. If you wish to go there be prepared for anything because you will be going into unknown territory. The better prepared you are, the more chances for it being a pleasant experience and not a disaster.

I think the best thing you can do is to seek out another woman who has experience and talk with her or them. Like internet chat rooms or web sites. Get information so you know what to do and what not to do. Then figure out a plan of action.

The question I have for you is, simply, in these thoughts and feelings what role do you play? Are you the aggressor, or are you the one being seduced by another woman. Is the sex mutually returned or does she do you or do you do her only. In other words does she perform cunnilingus on you without you doing it to her? Does she use a strap on or do you? The reason has to do with who is the dominate one in this fantasy. How does it unfold, is it a specific fantasy or do you just get sexually aroused at the sight of another woman or though of her having sex with you?

Is it only in terms of a threesome with you lover?

I would then proceed if you decide to do this with finding a woman lover who will share your first experience then possibly join you and your BF.

If you find out that this is not for you then you need not share this with him. He doesn't have to know, ever. He might be gone in a year so why even go there.

We all have secrets and secret lives, desires and we have all done things that our spouses don't know about and frankly probably don't want to know. That is part of the human condition, it's part of being a human being.

You know your mate. Is he the sexually adventurous type or a conservative type who tends to think anything but missionary position is disgusting?

A very large number of men find the idea (fantasy) of watching their woman with another female hot, especially if they can join in. If you do decide to discuss it with him, be sure to assure him you aren't planning to dump him for some lesbian lover you find. Make him feel a part of what you want to do and be sensitive to his fears of losing you.