To the original poster of this thread:
Here is an article on some recent medical research on the effect of tweezing on hair growth that was posted in April in the Scientific American. http://www.scientificamerican.com/articl...-like-bacteria/
It offers some explanation to your question.
There is a lot we still need to find out about hair growth, but observation over a number of years does form ideas which medical research can further explore.
Michael Bono offered you "food for thought" in his quirky way. Please don't take it offensively. He is a great teacher to us all, making us think, doubt, test and explore.