May not sound fun, right? Yet the fetish of genital torture is often used in scenes. Whether you want to incorporate it into an interrogation scene, be the "Mean Domme" for once, or just hear your slave scream, some genitorture may be right for you.
Generally, just the phrase "genital torture" is going to get your sub's blood pumping and fear spiking. Genital torture is so popular because it inflicts pain on one of our most intimate, vulnerable places. The psychological aspect is also huge, since you are attacking a place of vulnerability and sexuality.
My advice is to start slowly. You don't want to cause too much pain to your sub, or bring on the pain too quickly. The best idea is to mix pain and pleasure. Of course, play with a safeword.
If your sub is a woman, consider a pussy whip or other light, stingy instrument. You don't want to use anything hard or thuddy on tender breasts or vulvas. A speculum is a great idea, since you can insert this into the vagina or anus and then widen the hole slowly. This is great both for visual humiliation and to keep the orfice held open while you torture it.
As for actual torture, consider using many clamps and clips of various sizes and materials. Plastic, wood, and metal clamps are all available, such as brightly-colored plastic clothes pins. You can pretend to close them and laugh at her reaction, or you can clamp them and watch her arch and moan, or clamp them and then squeeze them tighter with your fingers (ouch!), and sometimes you can just leave them on while she endures the pain.
For more advance pussy torture, try light slapping and pussy whipping. Insert dildos and vibrators that are just a little bit too big. If you have a clit suction cup, use it on the labia and clitoris. Some people even use needles to pin the lips open or temporarily pierce the labia. Others clamp forceps on the inner lips and tie the forceps to a table, effectively splaying the inner lips.
Of course, as the Dom, you don't want to only provide your hapless sub with physical stimulation! As you torture her, talk to her. Describe what you are doing or going to do, chuckle sadistically to yourself, and exclaim over what you see and the pain you are inflicting. "I'm going to spread you with this speculum, my sweet.... ahhh, that hurts doesn't it??? Just a little more.... there, there, don't cry.... you look so deliciously HOT with your pussy spread open! And now I am going to stick this big, bad dildo in you til you cry for me to stop" is going to make your sub a lot hotter than if you cause all this pain in silence.
What if your sub is a boy? This type of genital torture is called Cock and Ball Torture, or CBT for short. There are lots of toys you can buy to help with CBT, such as cock restraints or weights you hang from the testicles. But you can still have lots of fun at home with no fancy store-bought toys.
Just like with women, you don't want to use heavy canes or paddles for CBT. Stick to a light slapper or single-tailed whip. This will cause lots of pain but no actual damage. Some brave souls even use catheters and insert all sorts of terrible things into a male sub's urethra (ouch!). Others paddle, punch, or strike the testicles. Some men enjoy ball-busting, which basically means you kick, punch, and stomp on his testicles. I don't understand it myself, but I've read accounts from men who said a Domme had them knocked on the ground in the fetal position, kicking and stomping on their balls with high-heeled shoes, and that they loved it!
If you want to keep it a little lighter, you can squeeze, knead, push, pull, massage, and slap the genital area. The mixture of pleasure and pain is sure to drive him crazy! You can also tie his balls up and pull on the string, or simply hang something heavy from them and gradually add to the weight.
When playing with genital torture, be safe! Play with safewords, discuss your activities beforehand, and have fun.