A reader writes:
I had tried many times to grow a beard but was frustrated by a large bald spot on my right jaw. I finally grew a beard that covered the bald spot, but the bald spot came back after a year, leaving me looking like I had a case of he mange. At about that time my wife and I adopted a rescued pit bull puppy. The pup constantly licked my face, and in no time the bald spot was gone! That was 13 years ago, and while that dog is (sadly) no longer with us, we have continued to adopt rescued dogs, my faced has been licked every day, and my bald spot has never returned.
I just thought I'd pass that along.