Why do so many women have vaginas and so few have penises? Cultural conspiracy? Or is there perhaps some other force or mechanism involved? I know which I think it is. :P
Tango's a good example -- yes there is obviously more male participation in that, especially at the professional level. But there has to be, IIRC, because the tradition is to have a male-female pair doing it. That old saying, "Takes two to tango!" I was talking more about among amateurs, among students, minors, etc. And other forms of dance. And in suburbs and rural areas, etc. From what I can tell in my life experience so far those subsectors of dance all mostly involve women. (Can't believe I need to even point this out. I can't even imagine a point anytime growing up where I ever saw a guy say, "Hey guys, let's go dancing tonight! giggle" whereas I had lots of exposure to incidents where women wanted to dance, or take dance classes, etc. That's what I'm talking about.) Also when I talked about males and dance I assumed straight males. A high percentage of males in professional dance seem to be gay -- just listen to them talk or walk sometime. And it's clear from studies that they have biological or neurological differences in their brain and hormones -- a point which further lends credence to the notion that men and women are different due to biological/structural/hormonal differences, and that this is probably a large factor involved in explaining statistical differences in interests, behavior and talents. Change a man's brain/body to make it more female and guess what both his body and his behavior become more feminine. And vice versa. Transsexual adjustment procedures depend on this fact. It's science, not wishful thinking.
This is my last post in this thread. Talking about gender in society on the Internet is right up there with religion and politics. Rarely leads anywhere. :)
I'm afraid your underlying logic is full of holes. At the very least, it's unimaginative, and fails to at least ask "actually, /why/ is this so?" As for the 70%, Wiki's "Science in Iran" lists it as specifically degrees in science and engineering. While Wiki is, at times, unremarkable in its factuality, this specific assertion is actually backed by citation.
Furthermore, biology being /also/ male-dominant in the US, your point doesn't hold well. What makes biology more female-oriented than chemistry or physics anyhow? What basis are you making such a claim?