The koon-ut-so'lik is a Vulcan mating ritual which literally means "marriage" or "proposal". For those yet not joined to another, their plak tow is channeled through some very strict and elaborate rituals. The Vulcan marriage is typically arranged in childhood by the parents. At the age of seven, the boy and girl are betrothed in a ceremony where they initiate a telepathic mating bond, locking their minds together so that at the proper time they would instinctively be drawn to one another again. When it is not possible to unite with his promised one, either due to death or the sheer impossibility of returning home, the male is free to choose a different mate in a declaration called koon-ut-so'lik. Either upon acceptance of the koon-ut-so'lik or the more conventional reuniting of the betrothed, the male and female meet in a Vulcan ritual known as koon-ut-kal-if-fee.
On Stardate 50537.2, Ensign Vorik of the USS Voyager underwent his first pon farr - and due to Voyager's circumstances - Vorik would not be able to return to Vulcan to find a mate. He proposed koon-ut-so'lik to Chief Engineer B'Elanna Torres to be his mate. (VOY: "Blood Fever")