Person A becomes a "ringleader" when they are in a threesome
that satisfies all of the following criteria:
1) Person B and Person C are the opposite gender of Person A.
2) Person B thinks they are Person A's significant other.
3) Person C thinks they are Person A's significant other.
4) Persons B and C do not discover that Person A has played
them both. They do not know they are both being cheated
on as a result of the threesome
This is considered one of the most difficult things to do in the bedroom, or in life in general.