Why should women not take steroids?
My girlfriend's on steroids and I'm sure she's hotter than your girlfriend. Beat that!
I am by no means saying that they should do a G of test a week, but certain steroids (mainly Primo and anavar, IMHO) can be used safely by women.
I really hope nobody helps you with your essay. It's people like you that make steroids look bad.
Yes, it WILL be harder to make steroids for women look good, but there's plenty of studies supporting that there are few side-effects at low doses for both men AND women. Just use a few of those, and you'll have some strong arguments.