Gregg Miller became a millionaire once he discovered his passion for dog balls. 
After Miller had to get his dog neutered he worried his furry friend would miss his..not so furry friends. At first the vet thought he was crazy until Miller went through with the operation and noticed his dog actually missed licking his own balls!

That's when Miller began developing testicular implants for neutered pets and it somehow took off!

Since their development, there have been over 500,000 sets of Neuticles!

There's 11 different sizes, including $2,800 watermelon-sized ones for elephants, with two different variations, "clackers" or silicone!

With the success of Neuticles, this guy has also turned his insane invention into earrings and even necklaces and has also written a book titled Going...Going...Nuts.

Yeah, this makes us feel really great about ourselves. Who would've known true success and riches lie within the fake testicles of dogs? 

Source: CNBC Make It