What are the main differences between men and women?

Girls are more willing to show their feelings.
Guys are more sentimental.

Oh, what an interesting question. First, there are many things to be discussed related to this question. Women think with a different part of their brain that men. Scientifically it has been proven that women tend to be more emotional. And from here, a series of differences. Women then to over-think things, they talk more, they analyze more, they are more emotional, hey need a lot of affection, and they also are very opinionated. And women also need men to show them how they feel and most important, to communicate! Just to name few.

Women are a lot more emotional then men

One thing I've noticed is women seem to be a little more emotional than men. Most guys seem to try to bury their emotions, but women don't. I'll tell you one thing. Don't ever discount women's intuition. Its a real thing, and it can achieve amazing things!

I know very little about women. It seems like that the "sisterhood" changes strategy and plans as soon as we, men, get any closer to figuring them out. :)

I'd say the main difference, from my experience, is the way we communicate and what our expectations and goals are.

Women tend to be more focused on their current feelings while we tend to be more focused on the end-state of any matter.

For example, the old classic question of "Do I look fat in this? " To us it is a simple matter, do you feel fat in it? If so, go on a diet or exercise while to them I believe it is more of an inner dialog. I don't /feel/ sexy right now and I would like some reassurance that I am still sexy to you.

. Then again those differences make life truly interesting between the sexes and lead to some very interesting discussions.