Female attractiveness is very malleable too. Haircuts, clothes, exercise etc make a huge difference. Most attractive girls, in my experience, spend a great deal of time working on making themselves more attractive.
FTR, I am female, and until I was 22 or so, I had no idea how much difference wearing clothes that suited me and styling my hair would make.
If that's the case, there should be a large number of undervalued-but-hot girls out there. Such a market inefficiency is just begging for some arbitrage. Either guys are failing to pick up on such opportunities, or are not motivated to go after them. Either way, some enterprising LW gentlemen should be getting into the LBO business!
http://theviewfromhell.blogspot.com/2012/09/toward-non-stupid-non-blank-slatey.html
The author gives a shout out to Less Wrong as a community with a perpetually skewed gender ratio, which is precisely the conditions under which polyandry appears to thrive.
Discuss. :)