Here's why:
* Shaving only cuts the hair at the surface of the skin. It doesn't affect the hair follicle, which is responsible for hair growth and is located beneath the skin.
* The rate of hair growth is determined by genetics, hormones, and nutrition. These factors are not influenced by shaving.
* The illusion of faster or thicker growth after shaving comes from the fact that the newly grown hair has a blunt tip. When hair grows out naturally, the tip is tapered and finer. The blunt tip can make it feel coarser or appear darker.
In summary, shaving has no physiological effect on hair growth rate or thickness.