A couple from work talked my husband into it, and he invited them over one evening. At some point, the other guy started getting frisky with me, and his wife actually encouraged him which was a strange experience to me. I ended up having a threesome with the two men while the other woman just watched, with a big smile. So, no talking, no preparation, it just happened, but I must confess that I enjoyed every moment of it anyway. We have been with several other couples since then, usually friends-of-friends, etc.