I thought it was pretty interesting that this spa offered this kind of service. They set a high bar — you have to purchase a regular massage session and keep the same therapist. I went straight for 90 minutes and added the hidden service. For the whole time I felt like the therapist had me tied up and was toying with me, a tingly, numbing sensation, and when they took full control it was just incredible. If you're usually into dominant–submissive play, you can give it a try.