Quick answer

To set up a strap-on, choose a harness that fits snugly but allows movement, select a dildo with a flared base that locks into the O-ring, and adjust straps so the base sits flat against your body. Practice wearing it alone first, then communicate with your partner about angle and pace before you begin.

Pick a harness and dildo that work together

Most strap-on harnesses use interchangeable O-rings to hold the dildo. Check that your dildo's base is wider than the O-ring opening so it cannot slip through during use. If you are using a double dildo, one end typically goes inside the wearer while the other end is for the partner; these often require a harness with a larger opening or a specialized design. Always test the fit with the harness empty before adding a dildo.

Adjust the harness for comfort and control

Put on the harness over bare skin or thin clothing. Tighten the waist and thigh straps until the base sits firmly against your pubic bone. You should be able to slide one finger under each strap. If the harness digs in or restricts breathing, loosen it slightly. A common mistake is over-tightening the thigh straps, which can cause chafing during movement.

Position the dildo and check the angle

Insert the dildo through the O-ring from the front so the base rests against the harness front panel. For vaginal or anal penetration, the receiving partner may prefer a slightly upward angle. The wearer can adjust by tilting their hips or using a pillow under the receiver's hips. Practice thrusting motions alone in front of a mirror to see how the dildo moves with your body.

Use lube and start slowly

Apply a generous amount of water-based or silicone-based lube to the dildo and the receiving partner. Water-based lube is safe with silicone toys but may need reapplication; silicone lube lasts longer but should not be used with silicone dildos. Start with gentle, shallow movements and ask your partner for feedback on pressure and speed. Stop immediately if there is pain.

Clean up and store properly

After use, remove the dildo from the harness and wash it with warm water and mild soap or a toy cleaner. If the dildo is silicone, you can also boil it for 3-5 minutes for deep cleaning. Hand-wash the harness according to the manufacturer's instructions, usually with mild soap and air-dry. Store the dildo separately from other silicone toys to avoid melting or warping.

Step-by-step strap-on setup

  1. Choose the right harness and dildo: Select a harness with adjustable straps and an O-ring that matches your dildo's base diameter. For double dildos, ensure the harness has a large enough opening or consider a specialized harness. Checkpoint: The dildo should not slip through the O-ring when you tug gently.
  2. Put on the harness and adjust straps: Step into the harness and tighten the waist and thigh straps until snug. You should be able to fit one finger under each strap. The base should sit flat against your body. Common mistake: Over-tightening can cause discomfort and restrict movement.
  3. Insert the dildo and test the angle: Push the dildo through the O-ring from the front. Practice thrusting motions alone to see how it moves. Adjust the angle by tilting your hips or using pillows for support. Checkpoint: The dildo should feel secure and not wobble during movement.
  4. Apply lube and communicate with your partner: Use plenty of lube on the dildo and your partner. Start slowly and ask for feedback. Adjust speed and depth based on comfort. Stop if there is pain. Pain is not normal.
  5. Clean and store after use: Remove the dildo and wash with warm water and mild soap or toy cleaner. Hand-wash the harness and air-dry. Store silicone toys separately. Next step: Check your harness and dildo regularly for wear and tear.

Products mentioned in this guide

  • KING COCK 16 in. Thick DOUBLE DILDO: KING COCK 16 in. Thick DOUBLE DILDO features a powerful suction cup base that sticks to nearly any flat surface and makes every dildo harness compatible. The suction cup base can be used for hands-free play or locked into a harness O-ring for strap-on use.
  • Lady Bonnd Galaxy Silicone Dildo and Plug Kit: Lady Bonnd Galaxy Silicone Dildo and Plug Kit includes an 8-inch dong and a free plug, both made from velvety liquid silicone. The silicone material is body-safe and easy to clean, and the included plug offers a warm-up option before strap-on play.
  • Femme Funn TURBO BALLER 2.0: Femme Funn TURBO BALLER 2.0 is harness compatible, 100% waterproof, and features 8 vibration modes with a turbo button. If you want vibration during strap-on play, this toy can be used in a harness and is easy to clean thanks to its waterproof design.