How to Use a Strap-On Harness: A Beginner's Guide

Choosing Your Harness

There are two main styles worth knowing about:

Underwear Harnesses — Soft, sized, and designed to look and feel like regular underwear. They come in a range of sizes for a comfortable, natural fit and are a great option for beginners - pull on and you are ready! 

The soft fabric offers more of a skin-to-skin feeling during play, creating a closer and more intimate connection between partners. If a traditional strap-on harness feels intimidating, an underwear harness is the perfect place to start. They're also fully machine washable.

Traditional Strap-On Harnesses — Featuring adjustable straps and buckles that fasten around the hips and thighs, traditional harnesses offer a secure, customizable fit that works for a wide range of body types. The look is bold and fully exposed at the back — and for many people, that's a big part of the appeal. They're beginner friendly, though it's worth doing a practice run before using so the buckles and adjustments feel second nature when it counts.

Both styles work with any harness-compatible dildo with a flared base.

Getting the Fit Right

For traditional strap-on harnesses, straps with buckles allow for personalized adjustment so the harness fits snugly on your hips. The O-ring should sit directly over your pubic mound for the most natural positioning.

For underwear harnesses, size by hip measurement rather than clothing size — always check the sizing guide before buying. The fit should feel snug and supportive enough to hold the dildo upright. Styles range from boxers and briefs to jocks and panties — and the best choice is simply the one that feels most like you. 

Strap Wearing Confidence

Getting comfortable in your harness before partnered play is one of those tips that makes a real difference. Put it on, adjust the fit, try it with a couple of different dildos — and take a moment to feel yourself in it. Feeling sexy and confident in your harness before you bring a partner into the mix transforms the whole experience.

Choosing the Right Dildo

• O-ring size — Match your dildo's base diameter to your harness O-ring for the best control and fit
• Size — Always start smaller and slimmer than you think. You can size up as you both get more comfortable
• Shape — Smooth and simple is the best starting point. Curved dildos are great for G-spot or P-spot stimulation once you're more experienced
• Material — Body-safe silicone is the most popular choice — soft, flexible, and comfortable for both partners

Using Your Strap-On for Different Types of Sex

Vaginal Penetration

• Use plenty of water-based lube — it's safe with all toy materials and makes everything more comfortable for the receiving partner
• Start slow and take your time with insertion
• Communicate throughout — check in on depth, speed, and comfort regularly
• Experiment with positions — missionary, doggy style, and spooning all work beautifully with a strap-on

Anal Penetration

Anal play with a strap-on can be incredibly pleasurable — especially for prostate stimulation — but it requires extra care and patience.

• Start smaller than you think. The anal canal takes more time to relax than the vaginal canal
• Lube is non-negotiable. The anus doesn't self-lubricate so use generous amounts and reapply frequently
• Let the receiving partner set the pace entirely — slow and steady always wins here
• Try a curved dildo for P-spot stimulation once you're both comfortable. Doggy style or lying flat with a pillow under the hips are great beginner positions for anal strap-on play

Double Penetration

For those curious about simultaneous vaginal and anal penetration, a dual O-ring harness makes the whole experience much more achievable and comfortable. Unlike standard single O-ring harnesses, dual O-ring styles hold two dildos securely in place at once — one positioned for vaginal penetration and one for anal — giving the wearer full control over both simultaneously.

A few things worth knowing before you explore:

• This is more advanced territory. Make sure both partners are fully comfortable with penetrative play individually before combining
• Size matters even more here. Go smaller with both dildos to allow for comfortable simultaneous use — the sensation of fullness is significant even with modest sizes
• Choose your harness carefully. Look specifically for a harness labelled as dual O-ring or double penetration compatible — not all harnesses support two dildos
• Lube generously and communicate constantly. Slow, patient check-ins make the difference between an uncomfortable experience and an incredible one
• Positions that work well: Missionary and spooning tend to offer the most control over depth and angle for double penetration play

Pleasure for the Harness Wearer

Strap-on play isn't just for the receiver. Here are the best options for wearer pleasure:

• Strapless strap-ons — Designed with a bulb at one end that is held internally by the wearer while the other end is used for penetration, providing simultaneous pleasure for both partners. Worth noting: strapless styles can take a little practice to keep in place during more active play — pairing them with a supportive harness gives you much more security and control, and is often recommended even for experienced users.
• Vibrating dildos — Many harness-compatible dildos have a built-in vibrator that can be felt by the wearer through the harness during play — a simple and effective way to add sensation for both partners at once.
• Harnesses with vibrator pockets — Some harness styles feature a built-in pocket designed to hold a small bullet vibrator against the wearer's body throughout play. A great option if you want hands-free stimulation without needing a specialist toy.

Hygiene & Aftercare

• Clean your dildo after every use. For more info check out our guide on How to Clean and Store Sex Toys Safely
• Never go from anal to vaginal play without thoroughly cleaning the dildo or switching to a fresh one
• Wash your harness according to manufacturer instructions. Underwear harnesses are machine washable — one of their biggest advantages over traditional styles. Traditional harnesses can be wiped down with a damp cloth or toy cleaner
• Store dildo and harness separately in individual pouches between uses
  

Final Tips for First-Timers

• Practice wearing your harness before play — getting familiar with the fit beforehand makes everything feel more natural and confident in the moment
• Talk about it beforehand — discussing expectations and desires with your partner makes the whole experience better for everyone
• Embrace the learning curve — strap-on play takes a little practice and that's completely fine. Laugh, communicate, and enjoy the process
• There are no rules about who wears it — strap-on play is for everyone regardless of gender, anatomy, or orientation. The only thing that matters is that everyone is comfortable and having fun

Up Next

• What Are Body-Safe Sex Toy Materials? (And Why They Matter) — The one thing worth knowing before you buy anything
• Best Sex Toys for First-Time Users — Not sure where to start? We've done the shortlisting for you
• How to Clean and Store Sex Toys Safely — Two minutes of care that makes every experience better
• Beginner's Guide to Sex Toys: Everything You Need to Know — The complete starting point for your pleasure journey