I think the author misses a key factor in life - that being the one earning the most money (other things being even) is the more attractive partner. And at the

I think the author misses a key factor in life - that being the one earning the most money (other things being even) is the more attractive partner. And at the end of the day, deep down, it's not how much money we have - it's how many kids, who in turn survive to reproduce.