IMHO, what features attract you to a woman have more to do with what you hear and see growing up then natural instinct (nurture over nature). Just look at the variety of what is considered beautiful between cultures and centuries. Heck, I can't even point at one culture and describe one preference common among all men (and women).
But, in general, visible muscles are considered to be strictly a male feature. So much so that some people can't see the obvious other features that define gender ("Muscles = Male" for them). 3deroticer is an example of this standard when he claims that no woman has looked like a woman in the Ms. Olympia since Cori Everson competed.
I'm sorry, but if you can't tell if a human being is male or female when that person is flat chested and muscular, than you need to attend an art class in the human figure. You also need to look at people's faces more often and listen to their voices. As much as I love an ample pair of breasts and soft curves on a woman, I know that there are all kinds of differences in how a woman's body is shaped different from men's. Hips! Legs! Shoulders! Butt! All those features (like the face) are different between men and women.
BTW, 3deroticer, it's no more legal for bodybuilders to use steroids then baseball players. You simply don't watch or read the right sources of news to know what is happening in sports that isn't considered "newsworthy" by the corporate "news services". Otherwise, you would know about the drug busts and people's careers and lives runned by steroids in the bodybuilding world. Otherwise, you know about the drug tests at some (but not all) contests. You would know that most people use strictly diet, exercise and (for some) food supplements to achieve the look THEY want without using steroids.
Although I've complained about some people's negative posts, I really don't mind if they feel the need to tell us their opinion. I just wish posters wouldn't make statements that equate their opinion with fact (or that everyone shares their opinion).