Balls have long been overlooked as a stimulable sexual organ - the Balldo changes that forever. 

By wearing a Balldo, users are perfectly encapsulated in the soft skin-safe silicone cage behind the penis-like conical tip, ready for ease of penetration. When inserted into a partner, the sensation is out of this world - for all involved. 

Not only does the Balldo get testicles inside a partner, it also allows users to thrust, almost identically to with a penis. However, unlike a strap-on, the wearer gets stimulated through the thousands of nerve endings within their testicles.