I think you might want to consider rephrasing it again, because the way you're describing it right now makes it seem like metal's no different from any other genre. Of course metal's dominated by male musicians, as explained in this excerpt from a research proposal that I wrote for a class last year.
Haha, I used two sources from Miller (2000) and didn't notice until just now. I can't remember which one that information is from though, so here are both of them, in case you're interested.
Miller GF, 2000. The Mating Mind: How Sexual Choice Shaped the Evolution of Human Nature. Doubleday Books, New York as cited by Pankskepp J, and Bernatzky G, Emotional Sounds and the Brain: The Neuro-Affective Foundations of Musical Appreciation. Behavioural Processes 60: 133 - 155
Miller GF, 2000. Evolution of Human Music through Sexual Selection, from The origins of music. Wallin, Nils L. (Ed); Merker, Björn (Ed); Brown, Steven (Ed); pp. 329-360. Cambridge, MA, US: The MIT Press, 2000. xii, 498
Thanks for the sources, I have to admit I'm having a little difficulty in phrasing question 5. I think people are misunderstanding me, thinking that in saying because it is masculine, women should not listen to it. Which is kinda innaccurate, what I'm really trying to get at in this project is how and why females enjoy metal and participate in the subculture, in contrast to males.
For now, I'll change it to this, but if there are any other suggestions please let me know:
5) Why do you think there is a female fanbase for the metal genre, taking into consideration its masculine attributes and relative scale of male musicianship (next to many other popular genres)?