I grew a beard when I was 22 years old. I'm now 63 years old, and still have it.
I've shaved it off a few times, and immediately grew it back.
On one occasion when my daughter was about 4 years old, I had shaved my beard off, when I went to pick her up at Pre-school, she didn't recognize me. When I finally convinced her that it was me, she told me to "shave it back on".
On another occasion, about 10 years ago, I have just finished shaving and stepped out of the bathroom just as my wife was entering the bedroom with a hand full of laundry. As she passed me, without breaking her stride, or even taking a second look, she said, "Grow it back".
Another time a was a witness in a court case, and the defendant's lawyer during a pretrial meeting, asked me to shave my beard off, because I looked like an "Iranian", of course my wife had something to say about that, and told the lawyer that without it I "look like a "fat Mexican"!
Needless to say 41 years later, I still have a beard, though instead of being black, it's now mostly white.