You are now leaving RedTube, welcome TO THE best porn experience. High Quality Content, offering exclusive content not available. It is most commonly used to describe a love relationship between two couples where it takes the form of a square, in which all four people have a love relationship with each other.
Gallery edit Painting by Alfred de Musset of three women and a man having a foursome. Airtight seal edit, the airtight seal involves vaginal sex and anal sex performed on a woman by two men in a double penetration, while the woman performs fellatio on a third man. For romantic/sexual relations with each person under one household, see mnage quatre.