@chai2,
This thread took a bit of a serious turn since last night.
I agree completely with Green Witch. Our maleness and femaleness are hardwired at birth.
I'm of the opinion that there is a huge difference in the way men and women think and feel and if we could change our sex for a day we would be stunned by the difference...and damned uncomfortable.
This is not to say that a woman can't have traits traditionally associated with masculinity or vice versa, but even similar traits will be expressed differently.
Hormones are pretty powerful chemicals. Look at the enormous changes they produce at puberty, look at the effects they can have on individuals when they are given as supplements. And this is just the chemistry of the sexes.
Studies of pre-pubescent children show that girls and boys think in different ways and that there is a neurology of the sexes.
Sometime ago Jeff Bridges starred in a movie called
Starman in which he played an alien that took on the form of a human male. From the very outset he played the character being unfamiliar with and ungainly in the human form. His physical movements were spastic, and his speech halting. I have no idea whether this was an accurate portrayal of what it would be like for an alien to take on human form, but I admired Bridges for thinking of the question and attempting to express an answer in his acting. Interestingly enough once he becomes more comfortable with being human he takes on being a male.
This is how I think we would find ourselves if we woke up tomorrow in the body of the opposite sex. I'm sure we would get used to it as we are amazingly adaptable, but I think it would be a very strange first few days.