It's a habit that bores have. To look scientifically defiant, in ways various.
Take Rob Fyfe, who is well into his 50s. I don't know him; I've met him. He has one problem. He looks as if he never suffered a childhood, adolescence, early adulthood; only he emerged fully formed, non-born, as a 33-year-old man. His doggish, please-don't-hurt-me mien is timeless.
Then there are other bores such as Georgie Best who