And this article from the Chronicle for Higher Education explains why not:
"It's like we have this trick scale... Here's how that scale works: Self-doubt and negative feedback weigh heavily on the mind, but praise barely registers. You attribute your failures to a stable, inner core of ineptness. Meanwhile, you discount your successes as accidental or, worse, as just so many confidence jobs. Every positive is a false positive."
And the worst part is? It's annoying. I become annoying, socially inept. I can't trust praise. I can't trust people. And so I end up this stuttering misanthrope, rushing out the backdoor after I'm done reading, afraid to confront, or even acknowledge, my audience.
Stupid cat germs.