Dating coaches make the point that women may "like," or "appreciate" a nice man, but they aren't likely to be attracted to, or fall madly in love with such behavior (until fairly late in the relationship, e.g. steady dating or engagement).
One such person, Leil Lowndes in "Undercover Sex Signals," noted, "A woman subconsciously listens to her genes." That one quote opened up a whole new way of thinking to me.
For instance, a domineering, hard-as-nails man might not be pleasant to live with, but a woman might be attracted to him because he is signaling that he would be a good (protective and providing) father for her children. Likewise for the "bad boy," who is unconventional, independent, and seemingly courageous, even though he may be "independent" to the point of being unfaithful.
Is it true that at some level, women and men who are dating "rate" each other based on the other's presumed parenting ability (e.g. that men prefer good looks as a sign of good "motherhood")? And that members of the opposite sex that aren't perceived as good parenting material are often "friend-zoned" despite their other virtues?
Of course, dating coaches have their points of view, but they are "street smart." More to the point, they sometimes cited scientific studies to prove their cases. So what to the "scientists" have to say about this matter?
Edit: This question is not about "externals" preached by pick-up artists like Pellicer, using such techniques as body language, eye contact, or good conversation skills. This is about the theory of a woman (Lowndes) who hypothesizes that we are only one step (in evolutionary terms) away from "cavemen," and that therefore evidence of good cavemen traits (toughness and self sufficiency for men, physical appeal for women) still makes one attractive (at a visceral level) to members of the opposite sex. Even though other traits such as intelligence, humor, and empathy might be more relevant in the modern world, they might not do as good a job at sparking immediate attraction as the more primitive traits.