"The Mysterious Housemate"

Three pieces come in the box: one bullet and two silicone sleeves that slide over it. The appeal of "The Mysterious Housemate" is trying two different sensations without buying two toys.

The eared sleeve is 12.7 centimetres long and sits against you from the outside, with the ears doing the work. The second sleeve is smoother and slimmer, 9.5 centimetres of it insertable, if you'd rather have it inside instead. The bullet on its own is 8.2 centimetres and 1.5 centimetres across, and the whole kit weighs 104 grams. One bullet powers both sleeves, so the strength is the same whichever you fit.

Fit the sleeve you want before you switch on, then work up through the settings (Rocks-Off lists up to ten). Use a water-based lubricant. The kit is waterproof, so the bath is fine, and a size N battery runs it for about two and a half hours. Rocks-Off has a two year guarantee on it.