Jesus christ. You guys are berkeleying retarded. "Car." is the answer. Or "Megaphone." Seriously. Who's gonna try to rape a bitch carrying a megaphone? Or "Sledgehammer" (see also: megaphone.)
"Self Defense Class" is a cute answer. My wife's best friend stopped talking to me for about a year. She had come to visit, and her new big thing (after blowing $X0,000 of het folks' money on massage therapy school,) was "Self-defense"
She'd been "training" for two years, and her instructor (who I'm guessing was simply trying to knock the panties off,) supposedly wanted her to get some bs certification to TEACH self defense.
I politely, patiently listened to how this was the greatest thing since sliced bread. How she was going to make ass loads of money teaching other women how to defend themselves. I listened to E36 M3 about pressure points, and this and that and the other GD thing for hours - politely...patiently.
Until (x) vodka tonics in, when I said something to the effect of "Let's say my 200 lb. ass wants to put your 120 lb. ass on the ground? How would you stop me?" Her eyes lit up. I mean like Christmas berkeleying morning.
I was actually expecting to get hurt. Some kind of nut punch or spock pinch or Gracie style some E36 M3, but being all sex-crazed and retard strong, I didn't care.
We go into the living room, and she says "Grab me from behind." (hawt.) She's got her arms up like I'm going to give her a hug or something. I put her arms down by her side while squeezing her abdomen. She says "No, not that way!" I start laughing. "Not THAT way!? Is that what you're going to say to your rapist?" She gets mad, tries to wiggle down. I stop her with my knee. "Now what?" I say. Her response was "I don't want to hurt you," to which I said "Put my ass in the hospital," and tightened up on her a little. She tried to use my weight/momentum against me, move me around, toss me over her shoulder, etc. She struggled till her face got really red and I said "Do I really need to put you on the ground, or are we done?"
She didn't talk to me for a long time...she also didn't become a self defense instructor. If a girl who's taken a self-defense class and can scream "NO KITTY BAD KITTY" real loud and stop you, you're not a very good rapist.
NOW, my 120 lb., works out 2 hours a day with a trainer and deadlifts (no_bullE36 M3,) 300lbs. fine-ass sister in law? I'd PAY to see a motherberkeleyer try to take her down.
I digress. If GF doesn't like guns, don't push the gun thing. The 'self-defense' thing is cute. Get her a car or a megaphone...or a sledge. Or just pound 80 different chicks and walk them to their cars. You're in college ferrchrissake. Why the hell would you have a 'girlfriend?'