I hate that my girlfriend gets drunk.?

It gets to me alot, she's seriously gorgeous and gets hit on alot. This I can deal with but when she gets drunk she pretty much gets abused [bum pinched, grabbed, **** groped] I know guys are ***** and their behaviour is awful. But I'm the one who steps in [and being the smurf that I am] and gets my face smashed in. I guess it comes with the trade but does she need to get so drunk?