We have tried the modern-day standard definition of "open-marriage" and it sucked. Involving single, vanilla people in a marriage in which both partners, thousands of miles apart, love and trust each other, and are dedicated and actually trying to make things work just plain led to disaster.
Vanilla singles and married people who don't want to cheat or leave their spouse just plain don't mix!!!
We learned some very valuable lessons, and have only had sex with and completely focused on each other for over 5 years now. We still haven't had any real experience with swinging, though... but we're working on it. We've redifined and solidified our marriage, our relationship is strong, we have tons of great sex, and only want to add new sexual experiences by playing with others together. The only possible downside has been that we are now even more selective of who we want to involve in our relationship. Picky, picky us lol. As a result, though... if it (meaning the ultimate: full swap! lol) never happens for us, at least we've had some great times & revelations along the way!
