Sure it'll grow back, but heartthrob Jason Mamoa has shaved off one of his endearing physical attributes... his beard. And I'm sure many women will be devastated. But don't worry, it'll grow back.
There are bigger fish to fry with Aquaman / Drago... the planet. He shaved his face clean to raise awareness about getting rid of plastic bottles in favor of recyclable aluminum cans. Jason makes his case while knowing you can't take your eyes off the locks of facial hair he's slowly discarding. Pretty effective if you ask me... even if tears ARE flowing for some while watching.
Actually he looks pretty good clean-shaven, even though I'm not his audience for that kinda thing.