"The Intelligent One"

The shape of "The Intelligent One" fills your palm instead of needing a handle. It's a smooth teardrop, 12.4 centimetres long, 5 centimetres across and 156 grams, so you press with your whole hand rather than balancing it between two fingers.

If your wrist gives out before you're finished with a small bullet, that's the reason to look at this one. The silicone has a tactile finish, and the curve follows the body, so small movements change where the pressure lands. Ten settings to work through.

Two AAA batteries give about three hours. Worth knowing: Rocks-Off suggests using it in the bath, but the spec panel publishes no waterproof rating, so treat it as a dry toy until the brand confirms otherwise. Use a water-based lubricant if you want more glide. Rocks-Off has a two year guarantee on it.