Balldo is marketed as a "ball-do". The idea is that one attaches Balldo to one's testicles, then fucks someone with it. Balldo is not yet available for purchase; a crowdfunding campaign is imminent.
A new Era in sex has arrived! We've created the world's first sex toy that will allow you to penetrate your partner with your balls and unleash pleasure that you've never experienced before. Let the ballsex revolution begin!
Following are testimonials provided by test subjects.