Overview: Rarely are you offered the opportunity to sharpen and dull your mind in the same half-hour of television. Well, tonight, we here at ""Unscrewed"" give it to you. First, the dulling. Choosing to neuter your dog is a very important choice. So important in fact that an industry has sprung up to fill the niche of prosthetic dog testicles. Hundreds of thousands of dollars were spent, years were devoted and in the end inventor Gregg Miller has handed us the Neuticle, a plastic (or hardened silicon) dog testicle replacement. Will your pooch be able to tell the difference? More importantly, will Fifi, the poodle down the street know? Now the sharpening (actually just less of a dulling). Ancient history is really, really old. I mean it's so old that no one really knows what happened, so people just make stuff up. On one hand you have your stodgy, scholarly types with their ""book learning"" and their ""facts."" But on the other hand, the hand sporting a foam finger stating ""Aliens are #1,"" we have to