Hi. I dont know if this is the right place to post this question, but i thought that maybe some of you “pluckers” or “shavers” would know 
Why does the hair on f.ex. your arm or leg grow to a certain length and then stop (while the hair on your head continous to grow)? What happens if i shave my arms? Will the hair grow longer when it comes back out, or will it reach the same length (as before shaving), and then stop? 
Andrea, feel free to move this topic to where you think it belongs.