- Road Rash: less painful when sliding on pavement during a crash (similar to carpet burn)
- Aerodynamics: less wind resistance
- Sanitation: hairs hold dirt and debris that can get into wounds; hairs also make changing bandages more difficult
- Massage: easier for a masseuse to work muscles
- Aesthetics: more muscle definition, smoother and faster look
Some of these are more tounge-in-cheek than others, at least for me. Guess which one is the most important reason.
Also posted this at HeardSaid, a blog for discussing plausible facts and trivia.
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