Let’s be honest for a second. If you have ever tried a strapless strap-on (often called an insertable strapon), you know the struggle. The idea is incredibly hot—getting closer to your partner without a harness getting in the way, feeling every movement inside your own body while pleasing them. It sounds like the ultimate intimate connection.
But the reality? Often, it involves a lot of slipping, sliding, and awkward readjustments that kill the mood faster than a cold shower. You aren't alone in this frustration. Finding a toy that fits your anatomy and stays secure during sex is the number one pain point we hear from our community.
We have tested the market, looked at the ergonomics, and analyzed the features that separate a frustrating night from a mind-blowing one. Whether you are looking for specific double stimulation or just a harness-free experience, this guide covers everything you need to know.
Quick Summary: The "Bottom Line Up Front"
What is an insertable strapon? Also known as a strapless strap-on or double dildo, this is a sex toy designed with two ends. The shorter, often bulbous end is inserted into the wearer (vaginally or anally) to anchor the toy, while the longer end is used to penetrate the partner. No harness is required, relying on pelvic muscles for retention.
Top Recommendation: For couples tired of toys slipping out, we recommend the Lesley: Triple-Motor Detachable Double Dildo for Lesbian Couples. Its ergonomic U-shape and triple-motor design solve the stability issue while providing stimulation to both partners simultaneously.
Buying Criteria: What Actually Matters?
Before you click "add to cart," you need to understand the mechanics. Not all double dildos are created equal. Since you are relying on your body to hold the toy rather than a system of straps, three factors are non-negotiable: Material, Shape, and Motor placement.
1. Material Safety
What is the best material? Medical-grade silicone is the only acceptable material for insertable toys. It is non-porous, can be sterilized, and warms to body temperature.
We cannot stress this enough: avoid jelly, TPR, or PVC toys. These materials are porous, meaning they trap bacteria that you cannot wash away. According to Public Health Post, using porous materials can increase the risk of irritation or infection due to trapped pathogens and chemical exposure. Always look for "100% body-safe silicone."
2. The Shape and "Anchor"
Why do they slip out? Most strapless toys slip because the internal "bulb" (the part inside the wearer) is too straight or too heavy on the external side.
To fix this, look for a defined U-shape or a pronounced bulb. The toy needs to hook behind your pelvic bone. If the bridge (the connection between the two ends) is too wide, your body will naturally push it out. If it is narrow and ergonomic, your pelvic floor muscles can grip it comfortably.
3. Motor Placement and Power
Does it vibrate? A static dildo is fine, but rumbly vibration helps distract from the muscular effort of holding the toy in place. Ideally, you want motors in both ends. This ensures the wearer gets clitoral or G-spot stimulation while the receiver gets internal stimulation. The best options, like the Lesley: Triple-Motor Detachable Double Dildo for Lesbian Couples, place motors strategically to ensure neither partner is left out of the fun.
Product Spotlight: Why We Choose the Lesley
We have looked at dozens of models, but the Bombex Lesley stands out because it addresses the versatility gap. Most strapless toys are "one trick ponies"—you can only use them for couple play. The Lesley is detachable, making it a 2-in-1 investment.
Here is a breakdown of why this specific design outperforms standard models:
| Feature | Standard Strapless Toy | Bombex Lesley |
|---|---|---|
| Stability | Often slips out; requires intense Kegel squeezing. | U-Shape design naturally contours to the pelvis for easier wear. |
| Versatility | Can only be used with a partner. | Detachable. Can be used solo, as a bullet vibe, or coupled. |
| Stimulation | Usually one motor in the center (weak transfer). | Triple Motors. Dedicated vibration for both partners. |
| Control | Single button, hard to reach during sex. | Remote control capability for hands-free adjustments. |
Mastering the Art: Positions and How-To Guide
Owning a high-quality toy like the Lesley is step one. Knowing how to use it is step two. Unlike a strap-on with a harness, an insertable toy requires a collaboration of movement between partners. It’s a team sport.
Here are detailed guides on how to make the mechanics work for you, ensuring the toy stays in place while maximizing pleasure.
1. Preparation: The "Grip" Technique
Before you even try a position, you need to understand the "grip." The wearer inserts the smaller end. Once inside, do a few Kegel squeezes (clench your pelvic floor muscles as if stopping the flow of urine). This helps your body recognize the object and settle it into place. The Lesley: Triple-Motor Detachable Double Dildo for Lesbian Couples is designed to assist with this via its bulbous internal shape, but a little muscle engagement goes a long way.
2. The Modified Missionary (The Lotus)
This is the best position for beginners to get used to the sensation.
- The Setup: The receiving partner lies on their back with legs spread or knees up. The wearing partner kneels between their legs.
- The Action: The wearer lowers themselves onto the receiver. Gravity is your friend here. Because the wearer is on top, gravity helps keep the internal end of the toy seated against the wearer's pelvic floor.
- Pro Tip: Do not thrust in and out wildly like you might with a harness. Instead, use a grinding motion. Grind your hips against your partner’s vulva. This stimulates the wearer’s clitoris against the bridge of the toy while maintaining a constant, filling pressure for the receiver. It’s less about depth and more about friction and connection.
3. Spooning (The Lazy Sunday)
If you want high intimacy with low athletic requirement, this is it. It also offers excellent retention security.
- The Setup: Both partners lie on their sides, facing the same direction. The wearing partner is the "big spoon" (behind), and the receiving partner is the "little spoon" (front).
- The Action: The wearer slides the external end of the toy into the receiver from behind.
- Why it works: In this position, the wearer's legs are naturally closed around the toy, which adds external pressure to keep it in place. You can use your thighs to help stabilize the base of the dildo. It allows for slow, deep intimacy where hands are free to explore breasts and bodies.
4. Scissoring (Tribbing Alignment)
This position takes advantage of the double dildo's shape to stimulate clitorises simultaneously.
- The Setup: Partners face each other with legs interlaced. One leg is between the partner's thighs, and the other is outside.
- The Action: This creates a tight seal between the two bodies. The toy acts as a bridge. By rocking hips together, the vibration from the triple motors in the Lesley transfers directly to both clitorises at once.
- Pro Tip: Use pillows. Placing a pillow under the hips of one or both partners can adjust the angle of penetration, making it easier to keep the toy aligned without straining your lower back.
Critical Safety & Hygiene: What You Need to Know
Your health is more important than a good time. Because insertable strapons involve fluid exchange and internal use for two people, hygiene protocols must be strict. We follow guidelines backed by medical experts to ensure you stay safe.
The Science of Lube: Water vs. Silicone
Here is a rule you must never break: If your toy is made of silicone, you must use water-based lubricant.
Why? It comes down to chemistry. Silicone lubricant and silicone sex toys share the same chemical base. If you use them together, the lubricant will actually dissolve the surface of your toy. This creates microscopic pits and pockmarks in the toy's surface. These pits become breeding grounds for bacteria and fungi that you cannot wash out, rendering the toy unsafe for future use.
Always stick to a high-quality water-based lube. Since water-based lube can dry out faster, keep the bottle nearby. For the Lesley, applying lube to both the internal bulb (for the wearer) and the external shaft (for the receiver) is essential for a comfortable seal.
Cleaning Routine
Cleaning isn't just about rinsing it off. You need to sanitize. Since the Lesley contains motors and batteries, you cannot boil it (which is a common method for solid silicone toys).
- Immediate Wash: Immediately after use, wash the toy with warm water and a mild, un-scented soap. Antibacterial hand soap is usually too harsh for sensitive genital areas if residue is left behind, so a dedicated sex toy cleaner is often the best choice.
- Get the Nooks: Pay attention to the bridge area and any ridges where fluids might collect.
- The Dry: This is the step most people miss. Dry the toy completely with a lint-free cloth or let it air dry in a clean spot. Storing a damp toy in a dark drawer can encourage mold growth.
- Storage: Store your silicone toys separately from other toys. Silicone can react with other materials (like TPE) if they touch for long periods, causing them to "melt" or fuse together. Use the pouch provided or a clean cotton bag.
For more information on safe cleaning practices, Hims provides an excellent medical review on sex toy hygiene.
Frequently Asked Questions
We know you might have specific questions about how this works. Here are the most common inquiries we receive.
Do insertable strapons actually stay in?
Yes, but it requires the right fit and some practice. A toy with a pronounced bulb or U-shape, like the Lesley, offers much better retention than straighter models. However, the wearer does need reasonable pelvic floor strength (Kegel muscles) to grip the internal end. If you find it slipping, try positions where your legs are closer together, like spooning, to add external support.
Can I use the Bombex Lesley for solo play?
Absolutely. This is one of the main advantages of the Lesley over other models. Because it is detachable, you can separate the parts and use the vibrating end for solo play, or use the U-shape insertable for solo anal or vaginal fullness while stimulating the clitoris externally.
Is it safe to use for anal play?
Yes, provided the toy has a flared base. The Lesley is designed with a safety structure that prevents it from getting "lost" inside. However, always use plenty of lubricant and ensure the receiving partner is comfortable and relaxed. Communication is key.
How loud is the motor?
The Lesley is designed to be discreet. While no powerful motor is completely silent, it operates at a low decibel level that is easily drowned out by music or the sounds of intimacy. It is much quieter than older, battery-operated models.
What if the size is too big for me?
Size compatibility is personal. The Lesley is designed with "average" dimensions to fit most users comfortably. If you are new to insertable toys, take it slow. Use plenty of lube and practice wearing it solo for a few minutes to let your body adjust to the sensation of fullness before introducing a partner.
Final Thoughts
Finding the right connection with your partner shouldn't be a chore. While strapless sex toys have a learning curve, the payoff is a level of intimacy that harnesses just can't match. It’s about being skin-to-skin, face-to-face, and sharing the vibration together.
If you are ready to ditch the straps and try something that feels natural, safe, and incredibly fun, the Lesley: Triple-Motor Detachable Double Dildo for Lesbian Couples is our top pick. It solves the slipping problem, adds triple the power, and adapts to your needs—whether you are playing together or flying solo.
