This particular domain of human behavior is so ridiculously irrational that I don't think it serves as a good model for ordinary, everyday human irrationality
Well, even if Geoffrey Miller's theories are overshooting it a bit, the role of sexual selection in the evolution of the human mind should not be underestimated. Rather than being some isolated dark corner or irrationality that can be safely corralled and ignored, it seems to me that various inclinations and biases related to the mating behaviors, whether directly or indirectly, are very much all-pervasive in the workings of human minds. Therefore, careful dissection of these behaviors can reveal a lot about human nature that is applicable more widely.
Followup to: Do you have High-Functioning Asperger's Syndrome?
LW reader Madbadger uses the metaphor of a GPU and a CPU in a desktop system to think about people with Asperger's Syndrome: general intelligence is like a CPU, being universal but only mediocre at any particular task, whereas the "social coprocessor" brainware in a Neurotypical brain is like a GPU: highly specialized but great at what it does. Neurotypical people are like computers with measly Pentium IV processors, but expensive Radeon HD 4890 GPUs. A High-functioning AS person is an Intel Core i7 Extreme Edition - with on-board graphics!
This analogy also covers the spectrum view of social/empathic abilities, you can think about having a weaker social coprocessor than average if you have some of the tendencies of AS but not others. You can even think of your score on the AQ Test as being like the Tom's Hardware Rating of your Coprocessor. (Lower numbers are better!).
If you lack that powerful social coprocessor, what can you do? Well, you'll have to run your social interactions "in software", i.e. explicitly reason through the complex human social game that most people play without ever really understanding. There are several tricks that a High-functioning AS person can use in this situation: