A threesome is sex among three consenting people. The fantasy is often two-plus-one with a clear center. The reality is three full vetoes and a lot of limb management. Someone will feel briefly left out unless the other two notice and repair it.

Talk about barriers, who may kiss whom, and whether the established couple goes home as a team no matter what. Jealousy after is common even when the night was wanted. A rule that the couple only plays together can protect the pair and can also make the third person feel like rented equipment. Avoid that flavor unless the third asked for a narrowly defined cameo.

Sobriety helps you count to three on consent. If one person is a maybe, wait. Maybes in a stack of bodies get flattened.