I don't have a coffee table.

This is, you'll quickly realize, the major drawback to owning the Tenga 3D. That's because this particular adult product is so aesthetically astounding you'll want to show it off to the whole world.

That might sound ridiculous, but it's not. When I opened up the Tenga 3D, I was presented with a smooth, soft cylinder decorated with such sublime squares that I didn't know where the art exhibit ended and the sex toy began. It was a solid cylinder, too - right angled ends and a flat bottom, which even stood up on its own. One of the reasons I wanted to show it off was because, at first glance, it looked anything but a soft, supple sex sleeve.

But the trick, of course, is to turn this masturbation sleeve inside out - so the beautiful textures are on the inside and give pleasure to more than just the eye. Once you've flipped the outside in, the Tenga 3D transforms into something one doesn't necessarily want to show visitors (but what you intend to do with it is best conducted in private, anyway.)

The Tenga 3D is made from blissfully soft and supple thermal plastic elastomer and is totally fragrance free. It's really a lovely material - nice and stretchy, and firm enough to give the rigid 3D pattern some texture, but not firm enough to the point that it would make the experience of using it uncomfortable (which is something other Tenga products, like the Flip, haven't always been successful with.

Wonderfully simple, the Tenga 3D flips inside out when you're ready to action - converting it from an innocent-looking cylinder to a plump, inviting fuckhole. The stretchy material of the Tenga 3D means that it can stretch to accommodate even the most impressive cock's girth and length, and the way flipping the sleeve inside out creates a mushroom head at either end makes it easy to grip even with hands that are slippery with lube (a common issue with non-rigid masturbation sleeves.)

If I did have a criticism, it's that the closed-end of the sleeve means you capture an air bubble inside the shaft as you're using it. You can normally solve this by parting the tight top from the shaft of your penis and squeezing the air out. The advantage of doing that is that you create incredible suction along the entire length of your cock.

Elastomer is not the safest sex toy material, but it ranks high. This is fine, since few people share masturbation sleeves anyway - and cleaning the Tenga 3D is a breeze because you can flip it totally inside out to wash and dry it. The only thing to be aware of it to use only water-based lube while using it (and you will need lube, in common with most masturbation sleeves.) Anything else will rot the plastic and destroy your lovely fuckable artwork!