I saw this a year or two ago on Talk Sex with Sue, but I couldn’t for the life of me remember the name. However, I finally found it.
It’s called the Monkey Rocker™, and from what I remember seeing on Sue’s show, it’s quiet and smooth. The rocking movement syncs with your (my) natural inclination to move during masturbation or sex. I’m always looking for a way to get around that whole body-spasm thing that cuts off manual manipulation right in the middle of a good orgasm.
It’s a little pricey, starting at around $800, and that’s without the attachments. But it’s Vac-u-lock compatible (oooh <3), making the human body completely optional. And according to the website, “your Monkey Rocker™ LOVES you! And is always ready to prove it.” Everybody likes a little lovin’.