Do NOT ride the sex swing with a complete stranger without your partner's permission.
Even in the most open of relationships, boundaries should be set to account for varying comfort levels. Play parties can be especially fraught with tension, since you're basically philandering in front of each other. Such a situation can be an incredible turn-on for some couples, but jealousy is still possible so you'll probably want to regulate the level of physical contact allowed with others. Or perhaps you'd like to create a rule stating that new boy toys must be shared. Whatever it is, make sure the parameters are clear before attending a gathering of libido-crazed men and women. In addition, I think it's only logical to point out that preordained rules should not, under any circumstances, be broken. Even if that guy over there has a cute butt, or that chick can do amazing things with her tongue, such rule-flouting spontaneity could serve to undermine the very foundations of your relationship. If, after observing some interesting sexual possibilities, you feel that you'd like to raise the stakes next time, bring up the issue with your partner. There will always be other orgies, and there's no rule saying that your MO can't evolve.
Do NOT smack that ass without asking.
Though somewhat flattered, my husband did not appreciate when a guy we had been chatting with tried—completely unprovoked—to stick a hand down hubby's pants on an unauthorized journey to his balls. When you're at an orgy and there's group lovin' all around, it can be tough to resist jumping feet first into someone else's bondage session, but personal boundaries still prevail. Before nibbling on that sexy stranger's ear, placing a hand on their thigh, or suckling their nips, show some manners and ask permission. It's important that all participants feel comfortable, and that all intimate acts are consensual. On the flip side, if you feel unsure about a sexual proposition, just say no. You can always change your mind later if you suddenly come to the realization that his tongue would feel really good in that orifice. But don't do anything if you don't feel ready.
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Do NOT ogle that couple in the corner like they're inmates at the Bronx Zoo.
While voyeurism and exhibitionism have a definite symbiotic place at any type of play party—I love the thrill that comes with the possibility of being caught!—there's a clear-cut difference between creepy and non-creepy. Be respectful of others' space, especially if they're trying to indulge in some sexy time with someone else. If you show yourself to be a good party guest, someone's bound to ask you to play!