Try the conservatory or the US Marine Band !!!

Proficient

If she tells you to straddle her face gets out the lube and starts stroking your cock while giving you a rim job I would guess she is proficient.  However this is just an educated guess.  If you let your hands wander down on her and play with her pu**y I am guessing you may have some intense music.
My advice, find yourself a submissive provider, that does incall and you will be well on your way to achieveing what you seek.  Or you could always call the provider you did it with originally.