More About Triolism
Another theory on the root of triolism has to do with Shakespeare's play, Troilus and Cressida. There is a scene in the play where Ulysses forces Troilus to witness Cressida having sex with another man. In fact, another modern spin on triolism assigns one party of the threesome as a more passive participant. This participant watches and masturbates, instead of taking part in the “action.”