I was sitting on the john yesterday, when I started thinking...  When and why did the trend begin for men to have short hair and women to have longer hair? 

I imagined this particular part of human history when human features were relatively well-developed, yet we did not have the capability to create tools.  In this time, men and women both let their hair grow out unabated.  Images of our early ancestors from Africa male and female all sporting sprawling Ben Wallace or Macy Gray-esque afros flashed into my mind.

And then what happened?  When did men start keeping shorter hair?

*shrugs*

Who knows?  Well, anyways, here's an interesting tidbit I read about.  The female human breast evolved in order to allow infants to suckle without suffocating.  This is because as human beings' brains became larger, their skulls changed shape to become flatter (compare our skulls with those of primate skulls), which makes breastfeeding from flat-chested mothers perilous.  So yeah, breasts are for the babies, not for the males.   Something interesting to share.