I think you're proving aidenn0's point: standards of masculine or feminine attractiveness vary across time, place, and culture, even if the lower-level instinct-based standards remain unchanged.

Desire is not just instinctive. To continue the example: a skirt, long hair, and jewelry can conform to either masculine or feminine standards of attractiveness, depending on who, where, and when you ask (and on the specific styles of said skirt and jewelry). Desire is rooted in instinct, but "nurture" clearly plays a huge role in shaping it.

I think it's perfectly reasonable to consider the possibility that "women's expectations of masculine behavior have changed in 30 years." The underlying instincts of romantic/sexual desire don't need to change for this to happen.