From the "Great, Where Was This Information When I Was Single?" Files, we learn from the Reuters "Health and Science Editor"
A study of young college women showed they frequently wore more fashionable or flashier clothing and jewelery when they were ovulating . . . . They tend to put on skirts instead of pants, show more skin and generally dress more fashionably.
This is just the sort of inside dope that I could have really run with back at college. Imagine one day you notice that the lovely coed who sits in front of you in English Lit is wearing a skirt and tank top, as opposed to the usual jeans and a sweatshirt. How much steeper would the college learning curve have been had I known what this meant? Think of the efficiency!