I have two red-haired women posted below. Obviously one is older than the other, but they do have distinct features - one resembles a baby face with round features and the later one has a more mature face with a stronger bone structure and a less rounded face.
Mature Face (conveys expertise and authority)
In Lidwell's text, it also discusses Waist-to-Hip Ratio, a preference for a particular ratio of waist size to hip size in men and women. Studies show that people favored males with a .90 waist-to-hip ratio and women with a .70 ratio. I took the test on page 207 and I agreed with the male rendering, but I didn't choose the most popular female rendering based on the waist-to-hip ratio theory.
I did a little more research on the subject and found even more encouraging news for curvier women, considering I have a .73 waist-to-hip ratio. We are smarter, too.