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Old 06-23-2016, 01:30 PM
TroutMan TroutMan is offline
Join Date: Sep 2008
Location: Portland, OR
Posts: 3,850
Googling led me to The Mating Mind: How Sexual Choice Shaped the Evolution of Human Nature by Geoffrey Miller. I read only a few pertinent pages from here, so I can't evaluate if there is any scientific backing for this or if the guy is a complete quack.

Miller suggests it is due to men selecting partners based on different indicators of fitness. One fitness indicator might be larger breasts, indicating adequate nutrition. Another might be a tall and muscular build, which is not necessarily correlated with breast size. Fitness indicators would be genetically prioritized under conditions of "scarce bodily resources." In his view, this explains why "not all women have very large breasts - many women may be genetically programmed to prioritize other indicators of physical and mental fitness."

I'm not totally sold on this.