This always caught my attention too. Now I realize this can be "the big picture" of why it happens (while it is certainly involved, is not as easy as just energ

This always caught my attention too. Now I realize this can be "the big picture" of why it happens (while it is certainly involved, is not as easy as just energy conservation): Natural Selection > Women selecting who reproduces and who doesn't > Hypergamy driving women's desires > Men performing to be selected > Obsession for performance > Natural Selection Filtering next generation > and so on.