There are different guidelines on how to best gauge when to phase-shift. For example, in the Mystery Method, from where the term originates, a PUA phase-shifts after receiving three genuine IOIs. With enough field experience and calibration, he can figure out when he has built up enough comfort and attraction to make a move.
There are also many phase-shift routines that have been created for the purpose of sexually escalating. One such example is Style’s Evolution Phase Shift routine that uses erotic biting and kissing in order to build up the sexual tension before going in for a kiss.
I phase-shifted smoothy into a long makeout session.
- Style’s Evolution Phase Shift Routine – Article on Style’s popular routine