Comments by "Keit Hammleter" (@keithammleter3824) on "Why Humans Have Big Butts | Gluteal Anatomy" video.

  1. The explanation given in this video, essentially that our butts are big because we need a big butt muscle to keep us upright, cannot be any more than part of the story. This is because butt size is clearly a secondary sex characteristic - women have much larger butts than men. Here's an interesting thing: My wife always had a sexy nicely curved butt. At age 60 she was diagnosed with breast cancer. As was standard for breast cancer, she was prescribed an estrogen agonist drug, as the most common forms of breast cancer thrives on estrogen. This caused 2 changes: a) she grew chin whiskers and had to shave, and b) she lost her nicely curved femaley butt - it shrunk down to boy size. Since she maintained her exercise level (her job entailed continually getting up from her desk and walking around her shop), that cannot be due to a reduction in muscle mass - it must be a loss of butt fat. So why do women have big butts compared to men, that is, why is it a secondary sex characteristic? It seems likely because humans have always worn clothes, but only recently on an evolutionary scale has it changed from loose fitting animal skins to form-fitted cloth. Therefore humans evolved at a time when how you could tell who was a woman and who was a boy needed to be a lot more obvious. Here's another thing: after her butt shrunk down, she for the first time found that sitting on a hard bench uncomfortable. Thus the thick adipose fat in both men and women protects the muscle when we sit - another reason for our large butts.
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