Why are women from Venus ?

Since we did so much on Venus this week, and I got such a horrible grade on my presentation's (even though I have no idea why) I decided to take a look at why woman are from Venus..
In the book Men are from Mars Woman are from Venus the authors primary message was that men and women have such different needs and expectations that they may as well be from different planets. So why Venus for woman? They say that Venus was names after the godess of love and beauty, so thats probably right. But just as capable as we are of love and beauty we can also be capable of toughness and roughness (Mars im guessing)

Gray's observation of men is that men value themselves through achievement. They want to solve problems and build great things. They think that problems are opportunities for a solution. If the problems are too big to solve, they go off by themselves and do something to forget about it. But, deep down, men fear that they are not good enough or not competent, and consequently desire to be needed and trusted. Women, on the other hand, value themselves through the depth of their relationships. They intuit others needs and automatically give of themselves to help. Their deep fear is they are not worthy of love. They give freely, too much even, but are afraid to receive, because to need someone and be rejected by them would validate that they are no worthy of love. Consequently, women want to be cherished and have their feelings understood.