Many people talk about how to plan and how to have a threesome. Actually, there is no need for such talk. The best is to let it happen spontaneously. Nothing is better than everything happens naturally. For swinger couples and singles, you don’t even need to discuss any rule for it. The best rule is no rule. If there is anything you feel uncomfortable about, I am sure you will figure it out during the process. If you planned it and discussed it beforehand, don’t you think it is a little of a buzz-kill and less fun?