Nothing missing in our marriage really. We went thru 10 years of hell with me being an unbeliever and staying together thru that. After that test we feel pretty industructible. My wife finally understands and trusts how much I love her and I saw her overcome the cult conditioning with that trust.
Our sex life is still good and that is not really the incentive either. Great sex was one main thing that kept our relationship viable when the religion was an issue. For us it's been about finding a new way to connect with people and I would agree that the key to an open relationship is being open. With eachother as well as in the sense of being available for an intimate relationship with others. No secrets but with respect for the others privacy as well. That being said, if it starts to be an issue we will stop and fall back to what we know best, each other. Although we tend to go out seperatly socially it's due to a lack of cheap babysitting. The one we use costs close to $100 if we stay out all evening and shut the bars down.
I've heard the non-specific stories of swinger/open couples tending to break up but I have yet to actually run into any of them myself. I've met a few since we started this and to be honest they have all been in a stable relationship for years. The only example like that I know of is with my sis in law who left her JW husband after having an affiar with an old high school boy friend who was in an open relationship. 1) She had been looking for a way out for years from her marriage. 2) her new guy and his wife were already having issues and did not have a trusting relationship to start with. I do see how this type of arrangment causes some additional stress, hell i feel pretty sorry for those who are single and dating. No matter how bad the date turns out I still have an awesome lady to return home to and the same for her. Getting to know someone, becoming intimate for the first time is akward and stressful and full of the insecurities we no long need to worry about with each other. The stresses of dating put some strain on us but like I said we have each other to fall back on and support one another. Plus it's been a really good distraction from the stresses of getting out the religion.
To those who don't like sharing....yeah I get ya, but just because you have a knee jerk reaction to something that does you no real harm, that does not mean you have to let it control you. Jealousy is about the insecurity/fear of being replaced. When toes get stepped on we talk about it. I'm not worried about that. If my marriage breaks up, it will because myself or my wife have decided to let that happen and not due to having a friend with benifits or two on the side.