-- I think what is most important is to talk to each other, and decide what works for both of you. There is no "right way" to "do" BDSM, no matter what you have read. It is individual for everyone.
For some, BDSM is only sexual play. For others it goes much farther. It could be that although your boyfriend doesn't get sexual gratification out of making you walk around with a vibrator in your pussy, he does enjoy the sense of control.... and gets turned on by that instead. If the ends are the same, does it really matter the motivations?
When I started this journey, it really wasn't much more than sexual fantasy. But the more I learned and discovered, the more I realized that the "kinky good time" was just a pleasant side benefit (VERY pleasant). It is the day-to-day aspects of D/s that I really crave. It is the kink that adds to the day-to-day control... and not the other way around.
http://www .submissivewomenspeak. net/ ponypearl.htm