Women: biologically the pickier sex?

A while back, a scientific revelation was made when researchers in Germany decided to investigate how exactly women go about finding a mate. Through extensive research (conducted through a controlled speed dating event), lead researcher Peter Todd of the cognitive science program at Indiana University, Bloomington, concluded that when it comes to dating, we follow the Darwinian principle: women are the choosier sex. The reason? Sex can be much "costlier" for the fairer sex, according to an episode of the Discovery Channel's "The Science Of Sex Appeal". Apparently men can have sex and walk away, yet women can face nine months of pregnancy and years of childcare. Hence women look carefully for a man with "good genes and deep pockets". The episode also talked about a survey carried out in Austria which showed that women can change their perception of a man from the car he drives. (Strange, but true.) This got me wondering: if women are indeed biologically inclined to be pickier than the gents, is that the real reason so many women are still struggling to find a man? Is it our biological make-up that prevents us from "settling" with one bloke and forcing us to think that there's always going to be someone better suited to us out there? ...