Five or more characters having sex freely among each other in various combinations, often through "chains" of partners.

If it's a large group of ten or more, also tag mass_orgy.

If a group of characters is having sex with the same character but not among each other, it should be tagged as gangbang instead of an orgy.

Related tags:

• life_of_the_party
• group_sex - Groups of people having sex in the same place, but not necessarily all together.
• parallel_sex
• penetration - Anal, oral, or vaginal, almost always taggable for orgies.

Not to be confused with

• gangbang - Large groups of people all having sex with one central character.
• reverse_gangbang - One character having sex with multiple partners.