There's that bit where Harry explains Lily's choice completely in terms of status issues-- this suggests that PUA/evolutionary psychology at least seems like a plausible set of theories to you. It's possible that I'm conflating them as having more in common than they actually do.

As I understand it, there are at least three separate things there: actual scientific evolutionary psychology; pop ev-psych, which is generally used as convenient rationalization for sexism and (less frequently) racism; and PUA, which is less science than engineering, but which comes with certain theories about why it works. I suspect that distinguishing the three properly probably requires a certain level of familiarity with the first one.