How can i expose someone’s groin for a strike?
So, the groin strike is one of the most oversold attacks in fiction. You don’t “expose” anything. There’s not some secret or special means of getting there, it’s not particularly well protected (except when your opponent is wearing a cup, in which case… yeah, very well protected); it’s just a matter of being close enough to hit.
The groin strike with the knee features prominently in self-defense because it is:
B) You start within grappling range.
In most self-defense scenarios you will be defending yourself from someone who is already close enough to touch you. Someone who is standing right next to you. When you are facing them, the knee to the groin makes sense. It’s a reflexive and easy strike, and relatively well hidden when they’re focused on something else. You can even play along, put your arms around their neck (with one hand strategically positioned on the back of their head to take control), and… bam. Knee to the groin.
However, like all pressure point strikes, the knee to the groin is a stunner and not a finisher. Whoever you hit with it will recover rapidly, which is why we combine it with other strikes.
Now, the knee to the face can be performed in the same range, and featured as the finisher in a combination with a groin strike. Again, the groin strike is not a “finish them” technique. It’s a distracting technique which opens up better protected parts of the body. You grab the other person by the back of their head, and drive their face down into your rising knee.
And… that’s about the extent of what we do with the groin.
You can kick someone there. You can punch someone there.
Both cases are more a matter of having poor aim or taking someone by surprise than a test of skill. The strike is an opportunistic one, not a dedicated martial move requiring a lot of setup because the move is risky. It doesn’t require a particular amount of skill either, you mostly just have to hit it hard enough to get lucky in clipping the nerve cluster. The issue with the groin strike is more that it’s considered a “dishonorable” move, which leads people to assume it’s a super effective one. They put it on par with throwing sand in someone’s face, but other dirty moves like throwing sand in someone’s eyes is actually much more effective as a battle tactic. There are better places to hit someone which lead to long term damage.
The short answer on exposing the groin is you don’t. You actually don’t need to because the strikes are not nearly as effective as Hollywood insists. Also, outside backroom bar brawls, most men (and women) actually do wear protection when engaging in actual combat or sparring scenarios. That protection is called the cup otherwise known as the jockstrap.
You don’t need to do anything special other than be close enough to pull off the hit. However, the question becomes why aim there? If you can get a better result from performing a front kick or a push kick into the stomach when you’ve exposed your opponent’s defenses then you’d aim there instead. The stomach has a lot of nerve endings too, you can forcibly disrupt the diaphragm, and hit a fair number of major organs. You get everything you’d get from hitting someone in the groin and more with results that last for a longer period of time.
In a friendly bout scenario, like in sparring sessions, hitting someone in the nether regions is frowned upon (especially if not accidental) and clipping occurs often enough that the intelligent wear protection.
In a self-defense scenario, a groin strike won’t be enough to stop your enemy in their tracks.
In a combat scenario, a groin strike suffers similar problems with the added benefit of likely being protected by actual armor.
Discussing groin strikes in fiction usually revolves around men, usually specifically around heterosexual women hitting heterosexual men in their “weak spot”. (If you never realized that sex is what this specific joke is about in fiction then I’m sorry, and, yes, this is a way to hypersexualize your female fighter. Why do you ask?) However, it is worth noting that groin strikes work on women.
If you write female fighters or just female characters in general, please do not fall for this bit of fiction about groin strikes. In the world of popculture fantasy, they’re just a means of proving Freud right. Everything is about titillation and the genitals.
In the real world, and I say this as someone with extensive experience in martial arts, the groin is not some secret weak point that must be defended at all costs. The groin is either convenient or just meh.