If you ride fast enough - sans clothing and hair -- they won't even see that you're naked!! You'll be a blur of motion! LOL!
Seriously, here's what I think about the hair. It won't make enough of a diff to be noticeable. BUT, but, but! It could make you FEEL faster and more dedicated to speed! And part of this is mental, you know. If you feel faster and think faster, in all likelihood, you will ride faster. Besides, hair will grow back. Why not give it a try?
Annie
Time is a companion that goes with us on a journey. It reminds us to cherish each moment, because it will never come again. What we leave behind is not as important as how we have lived." Captain Jean Luc Picard