You have points
"My fingers are in his hair, twisting hard, holding him to me. He grinds his body into mine, imprisoning me, his breathing ragged. I feel him" page 67
... and with the Release Together, you're bound to feel so much more! 8 patterns and 12 speeds to be more precise! It's like having so many of your partners pleasuring you at the same time. Buuut, if you don't like that idea and think it's icky, then we kid, we kid. Whatever works for you is your truth. Philosophy.
Note: Best to be careful with the tightness and do not use for more than 30 minutes at a time. Listen to your body and if it feels uncomfortable, best to loosen or remove completely.