RN
The distinguishing fact about strap-on sex is a negative one. Whoever is wearing the harness cannot feel what the toy is doing.
That sounds obvious and its consequences are not. In penetrative sex without a harness, the person doing the penetrating gets continuous information — resistance, angle, how much give there is, whether something has changed — and adjusts constantly without deciding to. A harness severs that entirely. What reaches the wearer is transmitted through webbing and their own hips: enough to know roughly where the toy is, nothing about what it is meeting.
So the feedback has to be rebuilt deliberately, out of talking and looking and going slower than feels necessary. Almost every practical rule below is a substitute for a signal that is simply not there.
Why the receiving end is the interesting end
Two separate things are happening and it helps to keep them apart.
The anal canal is densely innervated at and just inside the opening, and that concentration of nerve endings is why the first inch or two accounts for a large share of the sensation regardless of anatomy. It is also why depth is a poor proxy for pleasure and why beginners consistently overestimate how much of it they want.
Beyond that, the prostate sits a few inches in, towards the front of the body, and pressure on it is a distinct sensation that a lot of people find intense in a way that is not much like anything else. This is not orientation-specific, and treating it as though it were is the single most common reason people who would enjoy it never try. It is a gland in a location; it does not know who is touching it.
For people without a prostate, the anatomy is different rather than diminished. The same nerve concentration applies at the entrance, and the front wall of the rectum shares tissue with structures on the other side of it, which is why pressure in one place registers in another. The original version of this article invoked the Skene's glands here and put them deep inside the vagina. They are not there — they sit at the lower end of the urethra with their openings near the urethral opening, close to the vulval surface — and they are not what is being stimulated during anal penetration. The correction matters mostly because knowing where things actually are makes it easier to say what you want.
Then there is the part that is not physiology at all. Reversing the expected direction of a familiar act is, for a lot of people, most of the appeal, and pretending the psychological half is incidental produces advice that misses the point.
The equipment, and the two decisions that matter
Harness. Two families. Strap-style harnesses use webbing around the waist and thighs and adjust across a wide range; brief-style harnesses look like underwear and distribute pressure more comfortably but fit a narrower band of sizes. The functional difference is where the load sits. A harness that shifts under thrust makes the angle unpredictable, and unpredictable angle is precisely what you cannot afford when nobody can feel anything. Snug, adjustable, and adjusted before rather than during.
The O-ring is the compatibility question and it is the one people get wrong. Rings are interchangeable on most decent harnesses and they set which toys will fit. Buy the harness for the ring system, not for the toy it ships with.
Toy. Three requirements, and only one of them is about preference.
It must have a flared base — wider than the shaft, and wide enough that it cannot be drawn in. This is not caution, it is anatomy: the rectal muscles move in a direction that can pull an unflared object upward and out of reach, and retained rectal objects are a routine emergency-department presentation, tens of thousands of cases across a recent decade in the US alone. A harness helps but does not substitute for a flared base, because toys come loose from rings.
It must be non-porous. Silicone, glass, stainless steel. Porous materials — jelly, PVC, TPE-based novelties — cannot be sterilised, and shared or anal use is exactly where that matters. Non-porous also means it can be boiled or properly washed rather than wiped and hoped over.
And it should be smaller than you think, particularly at first. A gently curved toy of modest girth angled towards the front of the body will find the prostate; a large one will mostly find the limits of the person receiving it.
Lubricant, and one chemistry trap
Use much more than you would for anything else, and top it up before you think you need to. The rectum produces no lubricant of its own. There is no version of this that works without it, and under-lubrication is how people end up with small tears they do not notice until afterwards.
The trap: silicone lubricant degrades silicone toys. The two share a chemical basis and prolonged contact damages the surface — which is a hygiene problem as much as a cosmetic one, since a degraded surface stops being properly cleanable. Water-based lubricant with silicone toys, silicone lubricant with glass or steel if you want the longevity. Thicker water-based formulations sold for anal use hold up better than thin ones.
Method, which is mostly patience
Warm up first, with fingers, and take longer over it than seems proportionate. The external sphincter is under voluntary control and the internal one is not; the internal one relaxes on its own schedule, and no amount of intention accelerates it. Pushing against a muscle that has not let go yet is how injuries happen.
The receiving partner sets the pace. Not as a courtesy — because they are the only one with information. That means they control the initial entry, they say when depth changes, and either person can stop without negotiation.
Talk continuously and specifically. "Slower", "stop", "that angle" — small corrections, out loud, because there is no other channel. Position the receiving partner where the wearer can see their face.
Bleeding means stop. Not slow down. More than a trace of blood, or pain that continues afterwards, is a reason to see a clinician, and the visit is unremarkable to anyone who works in one.
And on hygiene: an ordinary shower and going to the toilet beforehand is the whole of what is needed. Aggressive douching irritates the tissue you are about to use and makes injury more likely rather than less. A towel handles everything else.
Harnesses and body-safe toys are stocked by the general sex-toy retailers, where ring compatibility and material are usually specified properly on the listing — which is more than can be said for most of the roundups written about them.