That's the most obvious problem: You risk losing the very things you need to escape safely. A lot of cars need keys to, well, be cars, and when you're using keys for melee tactics, there's a great chance you're going to drop them. If you're walking home and those are your house keys, well, now you've locked yourself out of your own house.

Keys are also just not great weapons. Keeping them between your fingers makes for a really weird angle from which to try to stab anyone, besides the fact that you could seriously injure your own fingers in the process. Go to the supermarket and try to stab some produce with your car keys. You'll see how much it hurts, and also get to meet the manager!

Now, there's one part of this that's correct, in my experience: The eyes are a great target. Just about any self-defense instructor will tell you to hit the eyes, jab the eyes, jam your fingers into the eyes, scratch the eyes, yell insults at the eyes, or if you want to do a lot of damage, dig your thumbs or fingers in there and gouge. (Fun gouging tip for the kids: Start in the center and push out.) Not only do ten fingers beat three keys, but they'll also help you collect some handy DNA under your nails to give to police.

So you can imagine the students' disappointment when they realize that the second they lift their foot off the ground, their attacker will either shift his junk out of reach or, worse yet, take advantage of the fact that they're off balance to push them backward on their ass. To keep this entertaining, I'll illustrate it with this clip from Freddy vs. Jason, in which Freddy goes for a spooky dick kick and Jason grabs the leg and tosses Freddy's charred ass across a cabin. It won't look exactly like that, but you get the idea.

I've been training in Commando Krav Maga for four years, and in that time -- as well as in my experience of having actually been assaulted -- I have never once successfully kicked anyone in the balls. Sure, I've sacked plenty of people. I once made a 6'5 professional stunt double roll over like a dead bug with an accidental punch. But I've never managed to kick them, as that's actually super easy to defend against.

The things that guy is doing in the video aren't complicated, and are in fact instinct -- he's just turning his hips a little, or twisting a way, or stepping back. The human dick is very mobile. Notice how Jason Vorhees had to basically stand perfectly still and wait for the kick in the clip earlier? Your attacker is not going to do that.

Now, you can maybe knee someone in the groin -- in which case you're leaning forward and are hopefully still maintaining your balance -- if you have practice. If you insist on going after the groin by some means, you can punch, or grab and twist. If you just really want to kick, go for shins or knees. But anything you do here is going to require balance, and fully extending one leg while tilting backward on the other already has you about 90 percent on the way to falling down.

I think there's a false sense of security that comes from carrying a fancy doodad like the Go Guarded Self Defense Ring, Cat Defense Keychain, or Smith & Wesson Tactical Pen, all of which only work if an attacker is a "crowded elevator" level of close to you. Waiting until your attacker has his hands on you before you start trying to defend yourself is far from ideal -- you're tangling with someone who is almost certainly stronger than you and, let's be honest, probably has more experience.

Likewise, a lot of women I know carry small knives for defense, and that's great, as they're shiny, look awesome, and can deter an attacker if he sees it and is sober enough to be deterred. But if your assailant doesn't know about / isn't threatened by your knife, then unless you've got a bayonet, it's not keeping him away. Again, I'm not against knives or up-close self-defense gadgets in general; I'm saying that it's far, far better to never let an attacker get that close in the first place.

I would go for weapons like mace, bear spray, a disorienting tactical flashlight, or the monkey fist paracord -- things that will work at a distance. There are also lots of improvised weapons that'll keep him away, like throwing change, whipping your backpack around, or thwacking him with your umbrella. Or if you're Canadian like me, just use that hockey stick you carry around in a case of a spontaneous game of ice shinny.

In Commando Krav Maga, one of our favorite weapons is a chair. Don't laugh! In last year's London terror attack, pubgoers kept one knife-wielding attacker at bay with pint glasses, beer bottles, and furniture. This probably won't kill or even incapacitate an attacker, but it might get him to back away far enough for you to run to safety or convince him to go find some other target who's not busy throwing the contents of their Costco bag overhand at his head.

People like the sense of security that comes with a gun, but a false sense of security is your enemy when we're talking about self-defense. Carrying a gun doesn't save you the trouble of learning this other stuff; it brings with it the responsibility to learn a whole other round of lessons, lest you wind up shooting yourself, a stranger, or just gifting a mugger a free gun. The more dangerous the weapon, the more responsibility you have to learn how to use it right.

One final note: If you're assaulted and you freeze, it's not your fault. If you fight back and fail, it's not your fault. No matter what you wear, where you go, what you drink, or who you mistakenly trust, it's never, ever your fault that someone else decided to hurt you. Do I recommend learning self-defense? Yeah, because maybe it helps your chances. But if you panic or get overpowered anyway, it's not your fault, and anyone who implies it is your fault is a goddamn idiot.

While I was writing this article, a friend's partner was sexually assaulted by a stranger at an amusement park while walking her two kids in a stroller. Thankfully, he was arrested. But that doesn't stop me from wanting to punch the guy's dick so hard that his dick meat somehow comes out of his dick hole. And the last time someone tried to cop a feel on me without permission was Monday. The world is kind of a s****y place sometimes; just try to be ready for it.

Mags Storey writes books with ghosts, murder, and kissing in them, and trains with far more talented and badass people in Commando Krav Maga. You can bother her on Twitter.

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For more, check out 6 Things You Need To Know About Self-Defense, From An Expert and 5 Self-Defense Books For Women (Who Want To Lose A Fight).

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