Great post Luke, I liked the wealth of informations provided and that you're trying to make the topic respectable to LW readers: relationship is an area of our life that is too important to let it in the grasp of superstition and old unfulfilling social scripts.

What I would like to see in the next post is something about partner selection: inside every mode of relationship there's a wide variance of experiences possible depending on the partner... I think a rational approach to romantic life should investigate the topic of selection on this level of granularity too.

I'm seeing this model inside your post: "learn how to use attractiveness as a currency to obtain the kind of relation that you like". Is this correct?

To increase attractiveness, I see that the adjustable parameters are basically physical aspect (what you can modify in the gym or with haircut/makeup/etc.), fashion, proximity and behaviour. Is this also correct?