* Hair growth is determined by genetics and hormones. Shaving simply cuts the hair at the surface, it doesn't affect the hair follicle or its growth cycle.
* The appearance of thicker hair: When you shave, the hair is cut at a blunt angle, making the ends appear thicker. This is because the hair hasn't been tapered naturally. However, the hair itself isn't actually thicker.
* Faster growth illusion: When you shave, the hair appears to grow back faster because it's coming from a fresh, sharp cut. It's not actually growing faster, just appearing to do so.
In summary: Shaving doesn't affect hair growth rate or thickness. It only affects the appearance of the hair due to the blunt cut.