Name Dropping

What is the deal with name dropping by authors?  I have been reading more books by black authors and I really don't understand why the need to do this.  You can't just say, "I pulled my compact from my purse".  You have to say, "I pulled my MAC compact from purse.  You can't say, "I just saw her truck outside".  You have to say "I saw her Range Rover outside".  What is really going on!


I know detailed descriptions are good, but is this really necessary all of the time?  Are these companies sponsoring you, aiding in getting your work published?  If the answer is no, why?