Double Dipping

I was grossed out by George's double dipping about 14-15 years ago when I first saw it in a Seinfeld episode. I know... I know... Not that I am a germaphobic, but, I did agree with Timmy that it's like licking the dip directly... and, it was nice to read that a simple study was done which suggests that I might have a point: Dip Once or Dip Twice?