They see stuff that represents their style, pin those, and get followers who also appreciate both the things and the sense of taste about things.
Secondly, they use it as that, "I want" or "feel of shopping" type experience, and that's a big part of what the sponsored pins are about.
A lot of women I see using the site use it to spot trends and or help them figure out what their look is, or could be, and that's inclusive. Dress, home, etc...
It's not enough to have good looks. It's about who is talking about them and some exposure. Just running an AD might net you a click from a woman who is intrigued, or who has her own well defined style and tastes.
Getting some sharing and discussion may well see you a lot more clicks from women who follow trends and or other women.
The language on your page might use a tweak too. It's clean and clear, but not entirely suggestive. I would get help changing that, if it were me.
Thanks a lot for this. Both me and my wife are non-english, it's really hard to choose the right words. We might need some help from a professional copywriter.