People skills, people!
I was at a meeting recently where a couple of the folk suggested that someone young and without much experience can't really be a master. I both agree and disagree with this.
If we're talking about skill then I agree. It takes years to gain the variety of experience with a wide range of submissives and slaves as well as the variety of experience with a wide range of BDSM practices and techniques to be a BDSM master in a technical sense.