At first, when you strap its vibrating bullet and battery compartment to your arm, you feel as though you're undergoing some form of medical testing, but once you get past the feeling that you're having your blood pressure taken, the TantraBeam Finger massager by Spartacus starts to deliver.

The purpose of the TantraBeam is to make your finger vibrate and thus enhance the sensation for your partner when you touch her, or to give yourself an added boost during solo sex.

It's certainly not a hardcore vibrator and I have to admit, at first I doubted that my partner would get enough stimulation to rock her boat, even if I placed the bullet itself on her clit, let alone the tip of my finger which buzzed even more softly. However, I soon discovered that it's the combination of intimate skin-on-skin contact and gentle vibrations that make the TantraBeam sensational.

We've tried products made from plastic, glass and silicone and nothing beats the feel of a warm, soft finger against your body, or rivals the sensation at the tip of your finger when you stroke somebody else. Added to which, I've always felt that there was something rather clinical about touching my partner with even the best of sex toys, yet there's no denying that vibrations are incredibly satisfying. The TantraBeam allows us to feel really close during sex and also gives the wearer a sense of control and involvement that no other vibrator has achieved for us.

The TantraBeam is perfect for gently running your finger all over your girlfriend's body and she'll find it particularly exhilarating on her nipples, labia and clit but due to the positioning of the bullet, deep penetration is pretty much out.

Rather pleasingly, the TantraBeam comes neatly wrapped in a gold bag with its own a discreet, compact case and 2 AAA batteries. However, with its bizarre Velcro straps, wires and skin-coloured plastic, I doubt there are many who would guess its true purpose even if I left my TantraBeam in full view of visitors to my bedroom.

Variety is the spice of life and I'm really glad that Spartacus has developed such an original sex toy. I wonder what they'll come up with next.