The act of wearing items of clothing and other accoutrements commonly associated with the opposite sex. Almost every human society throughout history has had expected norms for each gender relating to style, color, or type of clothing they are expected to wear.
This can be the fantasy of some slaves ever since they were young, to wear the opposite sex clothing. If a slave wants to play this activity on the session, I do suggest him to bring his own dress, shoes and other clothing he is fantasizing to wear with. These could include jewelries, high shoes, lingeries, under wears, t-back, bra and make ups.