To say the comic book industry has a slight gender skew is like saying Superman is kind of strong. Comic books - much like the film industry they now fuel - vastly under-represent women. The people who write comic books, particularly for major publishers, are overwhelmingly men.
Inherent vs. Gifted Powers The way the superheroes' sexuality is promoted is evident even unto the powers that they wield, and how they gained said powers. The different kinds of powers and the way in which they are used are strictly divided between the male and female heroes.