Feminization or feminisation (see spelling differences), sometimes forced feminization (shortened to forcefem or forced femme), and also known as sissification, is a practice in dominance and submission or kink subcultures, involving reversal of gender roles and making a submissive male take on a feminine role, which includes cross-dressing. Subsets of the practice include "sissy training" and variations thereof, where the submissive male is "trained" to become feminine.