Read this article by Guy Kawasaki . Can't stop lauffing after reading this :D
"And I have one more recommendation about business models. It is one of the more controversial things in the book. This theory is that when you are developing your business model, what you should do is ask women what they think of the business model. Specifically women. Don't ask men. The reason is that I believe men, deep in their DNA, have this code, this desire, to kill things. Men want to kill plants, they want to kill animals, they want to kill other people, they want to kill a lot of things. By and large, society has repressed this genetic need to kill things. By contrast, women do not have this DNA, do not have this need to kill things. So one of the problems with asking men about a business model is that men will always say, "That's a great business model" because men are trained or genetically inclined to want to kill things - no matter how stupid your business model is, they will always say, "This is a good way to kill the competition, that's a good business model". Women, by contrast, don't have this flaw. So ask women about your business model."