So, you’ve settled in for some sexy time with your favorite mechanical lover. It goes "buzz, buzz", you go "oh, ah". Your special bits are tickled to bliss. You lie in that glorious post-orgasmic euphoria and find your mind drifting. What is it about your favorite vibrator that gives it the ability to drive you absolutely wild?

Well, friend, let me break it down for you.

It's Physics

Yes, physics. Science is sexy, y’all.

Your typical vibrator contains a motor with a weight attached off-center so that it shakes as it spins, like an unbalanced washing machine. The mass of this weight is going to dictate which parts of your body are best excited by the toy. Why? Because of an underlying principle of machines: In order to transfer energy we need to match masses.

The extremely sensitive glans of the clit can be as small as a gram or so in mass, similar to the weight in most vibrators. The matched masses allow toys to efficiently couple energy into those small and excitable, external nerves. However, the glans of the clit is just the tip of an impressive clitoral iceberg, a vast structure of nerves that extends up into the pelvic region. The entire complex is a few hundred grams in size. So, in order to properly stimulate your internal pleasure palace, you want a toy with a larger motor mass. That's why large, powerful wand vibrators, like LELO's Smart Wand, have such a cult following. Stimulating that little nub of clitoris outside the body is merely knocking on pleasure's door - bigger toys have the power to shake the whole house.

Read: How to charm a Clitoris

Size and Shape

Size matters. There, we said it. And so does shape.

While a vibrator's motor dictates which body parts will be stimulated best, the size and shape of a toy determine which body parts will be targeted. If you’re looking for some G-spot action, you'll want a toy with some girth and with a curve that will reach that magical, erogenous zone. LELO's GiGi 2 is a great example of this. For external stimulation, there are lots of options. Some people like pinpoint stimulation, like you can get from a hard little lipstick vibe. Something like this would pinpoint just the tip of the clitoris. For broader stimulation of the entire vulva (and internal clitoris), the broad head of a wand vibrator is best.

LELO Smart Wand Large
The broad head on LELO's Smart Wand helps stimulate the entire clitoral complex, for explosive results.

Control

Most of us aren’t simply "on" or "off" when it comes to sex. Arousal takes some time, and we all get there differently. Your vibrator should respect that and offer you some options. Wand vibrators keep it simple; many just vibrate at a few different intensities (high, medium and low). Higher-end toys also tend to have a few different vibrating patterns.

Materials

Scary chemicals are, well, scary. Especially when you think about putting them into your body. After all, the vagina is a delicate mucous membrane, which means it's more susceptible to irritation and is more likely to absorb some of the nasty chemicals that can leach out low-quality toys. High-end sex toy companies use "platinum cure" silicone because it’s got an outer electron shell that is only partially filled. Electron shells are desperate to be full, which means that those unpaired electrons are desperate for interaction. Just think of them as "horny". (There’s that sexy science again!) A little bit of this platinum will interact with other precursor chemicals and transform them into nice, clean polymers. For those of you who aren't following the chemistry here, what all that means is that the material is safe for your hoo-ha. And that means you can relax and focus on your happy place.

Read: Choosing the Safest Sex Toys

You

The final ingredient to any great sex toy is you. You decide what works for you. Every body is different. So, what’s "Ho-Hum," to you might be "HO-LY HELL!" to someone else. That means that sometimes finding something that hits the spot takes a little scientific experimentation.

Now that you can piece together what it is about your special, mechanical lover that sends you off to pleasure town, the next time you find yourself in that dreamy post-orgasmic haze, you can wonder about other mysteries of the universe. Like, "How long as that spot been on my ceiling?"