Here is a related blog post that says it very simply. "Not Rocket Science". The best content are some of the comments to this blog.

http://www.chrisbrogan.com/not-rocket-science/?ds...

Michael Palmer, Life Coach

Great post. I have always loved this style of marketing. It is as if the humor gives me enough value to be exposed to the advertising. I am less likely to ignore it at the time and in the future and I remember and talk about it. Very effective.