I didn't realize that having a penis affected your musical ability.
I would have worried if you did.
Never said girls couldn't play electric guitar, just that they'll never look as cool doing it. You can't strut like we do.
I think more boys are attracted to rock than girls because of the good old sex thing.
Woman are very attracted to men who sing, dance or perform. Guys that would normally never get a look- in get elevated to adonis by strapping on a guitar or singing a tune. Every guy that joins a band, despite what other fabulous motives he has, knows in the back of his mind that his chances of getting laid just increased a million fold.
Guys on the other hand, will entertain an attractive lady whether she be president, a rock god or the illegal-immigrant cleaner. We don't care. No man finds Britney sexy because she sings. It's those damn outfits. No amount of singing and plucking is going to make Nana Maskouri any more appealing.
Just another of evolutions neat tricks.