Using a strap-on well is mostly about the things that are not the strap-on, the conversation before, the harness fit, the position, and the pace. The gear is the small part. The right setup is a harness that fits comfortably and stays put under movement (jockstrap-style for stability, panty-style for ease), a body-safe silicone dildo with a flared base sized to where you are starting (smaller is better for a first session), generous water-based lubricant, and position that gives the giver a workable angle without forcing posture. This guide covers the practical how-to, not the buying decision; for which harness and dildo to buy in the first place, see the strap-on harness UK buyer's guide. For couples specifically interested in pegging, see pegging UK couples guide and what does pegging feel like.
Strap-on, harness and dildo
A "strap-on" in UK retail is the combination of a harness (the wearable piece) and a dildo (the insertable piece), almost always sold separately so each can be matched to the user. "Harness" alone is the worn piece without a dildo attached; "dildo" alone is the insertable, which may or may not be designed for a harness (flared bases on harness-compatible dildos are the visible difference).
The conversation, before any gear
The most important preparation is not on a product page. It is the conversation about why both partners want this, what is on the table, and what is not. Useful prompts:
- What appeals about it specifically? The penetrative act, the role-reversal, the kit, the closeness, the visual; couples want it for different reasons and naming the reason out loud changes the encounter.
- What size are you starting with? Smaller than your instinct. Most first sessions end too early because the dildo was too large.
- How will you communicate during? The receiver giving specific verbal direction is what makes this go well; both partners agree how check-ins will work.
- What is the aftercare plan? Strap-on use is a high-trust activity; aftercare is real for both partners, not just the receiver, see the aftercare guide.
Harness fit
Three common styles in UK retail, each with a different feel:
- Jockstrap-style (rear-baring, leg straps): the most stable for active use; the dildo stays put under sustained thrust. Pros: best stability. Cons: more straps, longer to put on.
- Panty- or brief-style: looks and feels like underwear with a hole and ring for the dildo. Pros: easiest to wear, comfortable, fits under clothing. Cons: less stable than a jockstrap under heavy movement.
- Ring-and-O leather harness: the classic kink-aesthetic option; full-grain leather, brass rings, fully adjustable. Pros: durable, beautiful, lasts decades. Cons: longer learning curve to fit; more expensive entry tier.
For a first strap-on, the panty-style is the gentlest entry. Couples who continue often graduate to a jockstrap-style for stability or a leather harness for the aesthetic. For the full buying decision see the strap-on harness UK buyer's guide.
Dildo choice
- Material. Body-safe platinum-cure silicone is the standard; flexible enough to be comfortable, non-porous so it cleans thoroughly, lasts indefinitely. Avoid TPE blends, jelly rubber and unspecified "rubber". See body-safe meaning.
- Base. A harness-compatible dildo has a flared base that locks into the harness O-ring. Slim bases slip through harnesses designed for thicker dildos; check the diameter against the harness ring before buying.
- Size. Smaller than your instinct for a first session: around 4 to 5 inches insertable length and roughly 1.25 to 1.5 inches diameter. You can always graduate; starting too large teaches discomfort.
- Shape. A gentle curve (toward the receiver's navel during use) reaches the G-spot or prostate. Realistic and abstract shapes both work; the curve matters more than the styling.
Position and angle
For first sessions, the positions that work best give the giver a stable, low-effort angle:
- Receiver on hands and knees, giver kneeling behind. The classic first position; clear angle, easy depth control, both partners can communicate.
- Receiver lying back with legs raised, giver kneeling between. Eye contact, easier to read the receiver, harder on the giver's posture for longer sessions.
- Receiver on top, giver lying back. The receiver controls depth and pace entirely, which makes this the best position for very new sessions.
Common to all: the dildo angles toward the receiver's navel (anterior) rather than straight back, which targets the G-spot for vaginal use or the prostate for anal use.
Pace, pressure and lubricant
- Lubricant: more than you think. Water-based works with silicone dildos (silicone lube degrades them). Apply generously to both the dildo and the entrance, reapply if anything starts to feel dry.
- Pace: slow first. The receiver dictates pace; the giver follows. Slow opening minutes; the body adjusts to the size before any depth or speed.
- Pressure: angled, not deep. Most of the response comes from rhythmic pressure on the front wall (G-spot or prostate), not from depth. A medium-depth, well-angled motion outperforms a deep, straight one.
- The receiver controls everything. Verbal direction throughout: faster, slower, deeper, less deep, pause, keep doing that exactly.
Strap-on setups at a glance
| Use | Harness style | Dildo size | Best for |
|---|---|---|---|
| First session | Panty- or brief-style | 4 to 5", around 1.25 to 1.5" diameter | Easy fit, lowest commitment, gentle entry |
| Regular practice | Jockstrap-style | 5 to 6", around 1.5" diameter | Stable under movement, broader use cases |
| Anal / pegging | Either | 4 to 5", curved, narrower | Anal-specific sessions, see pegging guides |
| Long-term / premium | Leather ring-and-O | Whatever fits the practice | Decades of use, aesthetic, fully adjustable |
The giver's experience
This half of the conversation is rarely written about. For the partner wearing the strap-on, the experience is physically active and emotionally distinct from receiving:
- The harness creates pressure on the giver's pelvis with each thrust, which many givers find quietly arousing in itself, particularly with harnesses that include an internal vibrator or contoured base.
- Pegging or strap-on use is work. Controlling depth, speed and angle is more physically active than receptive sex; pauses and position changes are normal.
- The role-reversal is part of the experience. Many givers report enjoying the dynamic itself, separate from any specific sensation, a quieter version of what dominant partners describe in BDSM contexts.
Aftercare for both partners
Strap-on use is high-trust and often emotionally significant. Both partners need aftercare, not just the receiver. Water, warmth, a few quiet minutes, a check-in conversation. The giver has been working physically and emotionally. The receiver has been in an unfamiliar position both anatomically and relationally. See aftercare what it is.
Common mistakes
- Buying too large a dildo for a first session. Single most-cited frustration. Smaller, then graduate.
- Skipping lubricant or under-applying. Always more than you think; reapply.
- Silicone lube on a silicone dildo. Degrades the surface. Water-based with silicone, always.
- Going too deep too fast. The receiver controls pace; the giver follows.
- Treating it as performance rather than partnership. Strap-on use works when both partners are engaged, talking, and responsive.
Related reading
- Strap-on harness UK buyer's guide
- Pegging UK couples guide
- What does pegging feel like
- Anal training kits UK
- Best lubricant for anal play
- Browse strap-on harnesses
- Browse strap-on dildos
Frequently asked
- What size strap-on dildo should I start with?
- Smaller than your instinct: around 4 to 5 inches insertable length and roughly 1.25 to 1.5 inches diameter. Most first sessions end early because the dildo was too large. You can always graduate; starting too large teaches discomfort.
- What harness style is best for a first strap-on?
- Panty- or brief-style is the gentlest first harness: looks and feels like underwear with a ring for the dildo, comfortable, easy to wear. Jockstrap-style is more stable under heavy movement and is the next step. Leather ring-and-O harnesses are the durable premium option once you know what you want.
- What lubricant should I use with a strap-on?
- Water-based, always, if the dildo is silicone, silicone lube degrades silicone surfaces within weeks. Apply generously to both the dildo and the entrance, and reapply if anything starts to feel dry. For anal use specifically, see best lubricant for anal play.
- What position works best for a first strap-on session?
- Receiver on hands and knees with giver kneeling behind (clear angle, easy depth control), or receiver on top with giver lying back (receiver controls everything, lowest-pressure for a first session). The dildo angles toward the receiver's navel for G-spot or prostate contact.
- Does the giver feel anything from wearing a strap-on?
- Yes, in two ways. The harness creates indirect pressure on the giver's pelvis with each thrust, which many find quietly arousing, particularly with harnesses that include an internal vibrator or contoured base. And many givers report enjoying the role-reversal dynamic itself, separate from any specific sensation.
- Is using a strap-on safe?
- Used correctly, yes: body-safe silicone dildo with a flared base, harness fitted comfortably, generous water-based lubricant, the receiver controlling pace, and stop on any pain. Body-safe materials and the absence of porous "jelly rubber" matter, see body-safe meaning. For anal use, thorough cleaning between vaginal and anal use is essential.
Sources & further reading
- NHS, Sexual health hub, NHS UK
- Brook, Sex and pleasure, Brook Advisory
- NHS, Prostate health, NHS UK
- NCSF, Consensual kink safety standards, National Coalition for Sexual Freedom
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