Just a little food for thought:

If one were a well trainned slave, one would be quite capable of not only pleasing several different dominants over the course of her life, but also even in the course of one evening if nessesary.

A good slave is quite ready to accomadate in a fluid manner adjusting rapidly to new conditions, criteria and needs as they arise, and will not in any way need complete re-training.

For instance one may be familar with some of the different word trap games commonly used with a slave, trick questions designed to catch the slave in a falshood and find themself in need of correction? etc etc A cruel game perhaps? Both the slave and dominant know how it ends? (It ends however the dominant wishes is how it ends lol).

Well its actually also a well known training technique in some circles to help a slave improve his or her's wits and focus. Not to mention stress levels, disipline and a number of other things.

Often times endured while preforming other tasks, to increasingly more difficult levels of perfection. Try being interogated by a drill instructor or two while bound and or preforming sex acts.... not so simple right.

Most soloist practicioners of the art may or may not be aware that a lot of what some consider to be play or games (also once and still in some circles taught as such) serves as useful training tools that will serve that slave well when/if the day comes that the slave find his/herself without their dominant and or in the dominion of another.