From Cracked.com, here they are:
Yawning - it doesn't actually seem to serve any purpose. And it's strangely contagious.
Adolescence - Some believe teenagers were awkward balls of nerves and nose grease as early as the Homo erectus era over a million years ago, while others think it's a much more recent development.
Placebo Effect - A guy says he's feeling nauseous, you give him a sugar pill and tell him it'll cure it. He stops worrying about his stomach, thus the stomach calms down.
Dreaming - We really know very little about what causes them or what purpose they serve (Even though human beings are obsessed with dissecting and interpreting dreams).
Blushing - Some scientists, noting that women blush more than guys, have suggested that blushing developed specifically so they could prove they were honest and submissive towards men.
Pubic Hair - You're on your own on this one!
Yawning - it doesn't actually seem to serve any purpose. And it's strangely contagious.
Adolescence - Some believe teenagers were awkward balls of nerves and nose grease as early as the Homo erectus era over a million years ago, while others think it's a much more recent development.
Placebo Effect - A guy says he's feeling nauseous, you give him a sugar pill and tell him it'll cure it. He stops worrying about his stomach, thus the stomach calms down.
Dreaming - We really know very little about what causes them or what purpose they serve (Even though human beings are obsessed with dissecting and interpreting dreams).
Blushing - Some scientists, noting that women blush more than guys, have suggested that blushing developed specifically so they could prove they were honest and submissive towards men.
Pubic Hair - You're on your own on this one!
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