Incorporating a partner

I’ve been really intrigued by prostate play ever since I heard about the possibilities. My girlfriend is pretty uneasy about anything anal but after talking about it for a while she’s willing to try anything that doesn’t involve bare hands in the butt.

I was interested in something from Aneros after I heard the Sex with Emily episode about it, but from what I can tell those kind of work on their own from pelvic contractions. I feel like my big fantasy is for her to have complete control to “give” me these crazy orgasms. Does anyone have any ideas or relevant experiences?