You look like a bum.
You look like a big bear.
He grew his beard to keep him warm.
He grew his beard because he didn't have anything else to do over vacation.
You look like Santa Claus.
Hey, Mr. Goatee!
You look like a caveman.
I'm going to call you Mr. Facial Hair from now on.
A former student, Mr. Dancepants, is apparently giving his mom daily updates about the growth - "It is looking darker today Mom!"
One teacher mentioned that I looked like I slept under a bridge last night.