23 June 2026 · Sam

How to Use a Strap On Dildo

Ava Noir — Dildo Guides

How Do You Use a Strap On Dildo?

A beginner-friendly guide to strap-on dildos — choosing the right harness, fitting it correctly and using one confidently with a partner.

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For everyonestrap-ons are used by people of all genders and orientations
O-ringthe key harness component that holds the dildo in place
Practise solowear the harness alone before using it with a partner
Lube alwaysapply to both the dildo tip and the receiving area
Strap-on play is for anyone — used by people of all genders, sexualities and relationship styles to explore penetrative sex in new ways.

A strap-on consists of two parts: a harness worn around the hips and a dildo that attaches to it. The combination allows the wearer to penetrate a partner vaginally or anally without using their hands. Strap-on play is widely used by same-sex couples, mixed-gender couples and people exploring pegging — anal penetration of a man by a partner wearing a strap-on.

Choosing a Harness

The harness is as important as the dildo itself. A poorly fitting harness makes control difficult and the experience frustrating for both partners. The two main types are:

  • Adjustable strap harnesses — the traditional style with a waist strap and two leg or thigh straps meeting at a central O-ring. Fully adjustable and fits most bodies. Look for wide straps and sturdy buckles. The O-ring should sit directly over the pubic mound.
  • Underwear harnesses — designed to look and feel like regular underwear, with a built-in O-ring or pouch. More comfortable for extended wear and easier to put on. Sized by hip measurement — always check sizing guides.

For the dildo, choose a size that is comfortable for the receiving partner rather than impressive to look at. Dildos tend to feel larger in use than they appear. Start with a modest size in soft silicone.

O-Ring Compatibility

Most harnesses use an O-ring to hold the dildo in place. The dildo's base must be wide enough to sit against the harness panel but the shaft must pass through the ring securely. Check the O-ring diameter of your harness and compare it to the base width of your dildo before purchasing. Many harnesses include interchangeable O-rings in multiple sizes for versatility.

Fit the Harness Before PlayPut the harness on and adjust it fully before the session. A loose or uncomfortable harness is distracting and reduces control over the dildo.
Practise Solo FirstWear the harness with the dildo attached before using it with a partner. Practise thrusting motions to build confidence and find your natural movement.
Lube GenerouslyApply lubricant to the tip of the dildo and to the receiving area. Dildos feel different to biological anatomy and generally need more lubrication.
Communicate ThroughoutStrap-on play requires active communication. The wearer has limited physical feedback through the dildo — ask regularly about depth, pace and comfort.
Start With the Receiver on TopHaving the receiving partner on top for the first session gives them full control over depth and pace — the safest starting point for both.
Tighten Straps Between PositionsStraps can loosen during use. Check and adjust after every position change to maintain good control over the dildo's position and movement.

Shop Harness-Compatible Dildos at Ava Noir

Our dildo range includes harness-compatible designs in body-safe silicone — suitable for all O-ring harnesses. Discreet UK delivery available.

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Step by Step: How to Use a Strap-On

Step 1. Choose the right dildo and confirm it is compatible with your harness O-ring. The base must be wider than the ring and the shaft must pass through it cleanly.

Step 2. Fit the harness before play. Step into the leg straps, pull up and tighten the waist strap. The O-ring should sit over the pubic mound. Test the fit — snug and stable without cutting in.

Step 3. Attach the dildo through the O-ring so the base sits flush against the harness panel.

Step 4. Practise movement with the harness on before beginning with a partner. Thrust against a pillow to get a feel for the angle and how the dildo moves with your body.

Step 5. Apply generous lubricant to the tip of the dildo and to the receiving partner's vaginal or anal opening. Begin slowly with the receiving partner in control of depth.

Step 6. Communicate throughout. The wearer relies on verbal and non-verbal cues from their partner since there is limited physical feedback through the dildo itself.

What Is Pegging?

Pegging refers specifically to anal penetration of a man by a partner wearing a strap-on. The same principles apply as for all strap-on use: good harness fit, appropriate dildo size, abundant lubrication and clear communication. For more detail see our guide to dildos for men.

Related Guides

How to Use an Anal Dildo Safely Dildos for Men: How to Use One How to Use a Suction Cup Dildo Back to All Dildo Guides

Frequently Asked Questions

What size dildo should I use with a strap-on?Choose a size that is comfortable for the receiving partner. Dildos tend to feel larger in use than they appear. A modest size in soft silicone is the best starting point and you can explore larger options once both partners are comfortable.
Can all dildos be used with a strap-on harness?No. The dildo needs a flared base that is wide enough to sit against the harness panel without passing through the O-ring. Check base diameter against O-ring size before purchasing. Most harness-compatible dildos will specify the required O-ring size.
Does strap-on play feel good for the wearer?Not directly through the dildo itself, since there is no physical sensation transmitted through it. Some harnesses include a small internal stimulator for the wearer. Many wearers find the psychological experience of the role highly enjoyable regardless of direct physical sensation.
How do I stop the dildo from wobbling?A wobbling dildo almost always means the harness is too loose or the O-ring is too large for the dildo. Tighten the harness straps and ensure the dildo base sits snugly against the panel. A smaller O-ring that grips the shaft more firmly may help.
How do I clean a strap-on harness?Remove the dildo first and clean it separately. Most fabric harnesses can be hand-washed or machine-washed on a gentle cycle. Leather harnesses should be spot-cleaned with mild soap and water. Always check the manufacturer's instructions for your specific harness.