Group sex (Polyiterophilia)

Group sex is any sexual encounter involving more than two people at once. It covers a whole spectrum: threesomes (the most common fantasy), foursomes, partner-swapping among swingers, and full orgies with many participants. Polyiterophilia is the specific arousal at having many sequential partners in one session. The draw blends variety, spectacle, being desired by several people, and the taboo of going beyond the couple. It ranges from a one-off threesome to organised parties and lifestyle communities.

The appeal is abundance and novelty — more bodies, more sensation, being the center of attention or watching partners with others, and the heady taboo of group play. For couples it can also be a shared adventure that builds trust.

Arrangements vary from an invited third joining a couple, to two couples swapping, to a party where many mingle and pair off. Ground rules are set beforehand (who does what with whom, barriers, boundaries), then play unfolds by mutual, ongoing consent.

More partners means more STI exposure, so use condoms and barriers, change them between partners, and test regularly. Negotiate everyone's boundaries and a way to pause or opt out at any moment, watch for jealousy in couples, and keep enthusiastic, ongoing consent from everyone. Alcohol and drugs blur judgment — go easy.

It comes in many named flavours — threesome, foursome, gangbang, orgy, and 'swinging' (couples swapping partners) — each with its own etiquette. Much of it happens through organised communities: swinger clubs, play parties, and lifestyle events with their own consent and house rules.