The first few times I play with a sub I endeavour to discover their particular pleasure buttons. This learning experience involves both practical discovery - probing the body with fingers, hands or tongue - and simple conversation (often aided by inhibition-reducing pub drinks). I want to become as expert in them as possible.
My education never ends. After years together I was still uncovering joy switches with my last sub. Also, with increased time together comes increased trust to try new things. I'm in early education stages with a new sub now and already I'm very much enjoying being a student again.