Nose Grease Effect on Beer?

As we tried to get rid of the foam in our beer from the sake bombs we were getting ready to take at our favorite hibachi restaurant, we wondered why people tell you to touch your nose and then stir the beer with your finger. We have both done this many times before but never spent the time to wonder why it works. We suppose it's the result of the chemical reaction...but whoever discovered that is a genius. Anyways, next time your beer is foamy, there is a quick fix!