Well, here's an interesting toy. Most male toys are tubes you insert your penis into, which are great for masturbation butn not sex. The Fun Factory Manta, on the other hand, works when tugging at your penis, when getting a blowjob, or during sex.
If you'll look at the toy, there are ridges, which are for lubrication, making it well distributed as you glide the toy up and down your dingalingalingalingalingaling while the motor adds that vibration to make the feeling all the more yummier! This works the same when receiving a blowjob in that it it can be situated at the base or stroking the penis while your partner focuses on the head.
When it comes to sex is where it gets even more interesting! There are vibrations for your penis, yes, but it can be made so that the vibrations transfer through your shaft and onto your partner. Yes, your penis then becomes the vibrator!
Ahhhh, the toys folks come up with. Unusual as it may look and seem, its sales globally and reviews around (check 'em out!) speak volumes.