A sexual arrangement involving exactly three members. Any variation of gender and sexuality is acceptable, but it must include three members partaking in sexual activity with one another to be considered a true ménage à trois.
A typical example of a ménage à trois is when a married couple asks someone to join in on love making session.
Example
Helena and Tina were discussing their various sexual adventures over coffee. Having both been married for a while, they relished the opportunity to share stories. Helena: “Mike and I invited Sharon over for a ménage à trois the other night, it was so fun!”
