borrowed genitals
An act in which one character "Borrows" and either shows off or uses, the genitals of another character, as if they were the fist characters. All while leaving the second character intact, alive, and technically separate. Many methods can apply, IE: (vore, encasement, portals, detachable parts, etc.) All genitals guy nits, lady bits, and everything between and outside.
related: Living_Testicle