There are two foundational pillars of a BDSM relationship between a Dom and a sub: consent and trust. Everything else in the relationship - the fun, the love, the discipline, the eroticism, the tears and the journey - are all built on those standards. Both consent and trust require honest communication in order to thrive. The vast majority of that communication begins long before the training begins.
In "Dom's Guide to Submissive Training Vol. 2," I listed 25 things you must know about your new sub if you want to create a satisfying relationship with a devoted submissive. It's not enough to just ask "What do you like?" or "Would you like to be my sub?" You need to know things about your sub that are deeper, more practical and helpful.
Without the knowledge of these 25 things, you may be able to create momentarily excitement but it will surly turn into a frustrating short-term relationship headed for drama, disaster and end.
Following this guide allows your sub to communicate freely and provides a mechanism for her to reveal her true self - even if she doesn't have the words to do so. There are a million things subs want their Doms to know. These questions will help your sub tell you.