Why do we have pubic hair anyway?

I have a theory, based on a sample of one - me :p) FYI: I'm not a naturally hairy person.
I tried shaving twice. After both times, I found that with just the bare minimum of physical exertion, I felt uncomfortably hot and sweaty in my nether region. I also created two great cases of jock itch, which required an over the counter cream to ease the pain.

Therefore: I conclude that a hairy crotch is our modern bodies evolutionary response to wearing underwear. The hair creates a buffer zone of air that keeps us cooler in our tighty-whities.

Bottom line: I'm going to be neatly trimmed verses wild and unabated growth.

What do you think?

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