As readers of this site know all too well, there have been many, many, many attempts to meld interactive video games with hardcore porn, and despite the occasional interesting result it's been pretty much a total failure. Why is this such an impossible task? (Besides a lack of money, creativity and raw computing power?) It has to do with a little rule of animation and robotics known as the "Uncanny Valley." What is that exactly? Well, last week's episode of "30 Rock" provided the clearest, most succinct explanation of the concept that we've heard yet—by breaking it down into a "Star Wars" metaphor, of course. See why your dream of fighting off an alien invasion while boning 3-D Hillary Scott clones is never meant to be.

· 30 Rock (full episode @ hulu.com)
· Uncanny Valley (Wikipedia)

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