Being members of the Lifestyle (Swingers - for any that don't know), I've noticed that one-on-one sex is still good, but it's not so electrifying as before (whatever one-on-one partner, old or new, I'm with). A warning to those that have not shared a partner or been involved in groupsex at all. Not only can it become addictive, but it can also make you want (or at least only be fully satisfied with) sex of that nature. Strait sex can become a little like a boiled egg without a pinch of salt. Has anyone else experienced this and does it last forever?