Shaving does not cause hair to grow back thicker or coarser. This belief is due to the fact that hair that has never been cut has a tapered end, whereas, after cutting, there is no taper . Thus, it appears thicker, and feels coarser due to the sharper, unworn edges.
Probably the most common of misconceptions. Drives the intellectual snob in me crazy.
If it appears thicker, and feels coarser, is it not both thicker and coarser? I think Descartes weighed in on this at some point.