It adds something when the gal uses a special term or name to address her slave. 'Loser'. 'Chastity boy'. Or, probably meant ironically, 'sweet boy'.
The funny thing is that the one who calls him 'sweet boy' is not his keyholder. I am eternally fascinated by a victim's female friends, acquaintances and workmates, and their reaction to finding out about his chastity.