In my "wild" days, I visited both types of establishments: "erotic" and "medicinal"
The "erotic" session cost me $300 for 1.5 hours. I had spoken with the "assistant" several times on the phone discussing desires and such before deciding to make the trip to the "doctor's office" (which was actually a room in a "dungeon") but once there I just could not quite get into the scene.The "nurse" assistant verbally and visually "encouraged" me (no touching here!) and although I found relief, it just wasn't up to what I had imagined in my mind.
In the meantime, I had also been getting colonics monthly by a therapist who worked out of her house. She knew that I used enemas frequently - I never told her the *real* reason for them, but I think she knew 'cause she would always make sure I was very well filled before tripping the release mechanism. And, although she was middle-aged, she never wore a bra under her white blouse - a fact I rarely missed.
She did once offer to give me a "implant" enema, but I declined because I was worried about the 45 minute ride home!
Overall, I would say I was more comfortable and turned on by my vanilla colonics than by the erotic session.