This page contains information regarding Star Trek: Strange New Worlds, and thus may contain spoilers.
In 2259, Spock and T'Pring performed the Vulcan soul-sharing to better understand each other's perspective and thoughts in an effort to improve their relationship. The ritual included candles, bells, and a recitation in the Vulcan language. At the conclusion of the ritual, they had found they unintentionally switched bodies through a katric transfer, an effect Doctor Joseph M'Benga attributed to the emotions at play. (SNW: "Spock Amok")