RN
This is general information, not medical advice. Nothing here is a diagnosis, and pain that recurs is a reason to talk to a clinician rather than to change position and hope.
The premise of every "most dangerous positions" list is that injury is a property of the position. It mostly is not. The same arrangement of two bodies can be fine a hundred times and hurt on the hundred and first, because what actually varies is angle, force, lubrication, arousal, how tired you are, and whether anyone said anything when it started to feel wrong.
That said, the injury literature does exist, and it is more interesting than the listicle version.
The penile fracture claim, corrected
Penile fracture is real. It is a rupture of the tunica albuginea — the fibrous sheath around the erectile tissue — when an erect penis is bent forcefully, usually by slipping out and striking the perineum or pubic bone. It is a urological emergency. The classic presentation is a snapping sound, immediate loss of erection, swelling and bruising. It is treated surgically, and outcomes are better the sooner someone is seen. Emergency department, not the morning.
The internet has settled on a confident answer about which position causes it: woman on top. That answer comes largely from smaller and earlier case series, and the larger ones do not support it.
A 288-patient series published in International Braz J Urol, covering twenty years, attributed 43% of sexually-caused fractures to rear-entry, 40% to man-on-top, and about 12% to woman-on-top. A separate 90-patient series in the International Journal of Impotence Research found a similar ordering, with rear-entry cases also tending to be the more severe ones. Both invert the received wisdom.
Two caveats matter more than the numbers. First, these are counts of people who arrived at hospital with a fracture, not rates per encounter — nobody knows the denominator, so "43% of cases" is not "43% of the risk." Second, the mechanism is the thing to remember, not the ranking: fracture happens when the penis comes out and goes somewhere it should not, under force. Any position where that is easy is a position where it is possible. Rear entry and standing both fit that description because visibility is poor.
Where pain comes from, mechanically
Sorting by cause is more useful than sorting by name.
Depth. Deep penetration can strike the cervix, which is not erotic for most people and can produce a distinct, sharp, sometimes nauseating pain. Positions allowing the most depth — rear entry, legs raised — are the ones where this shows up. The fix is not abstinence from the position but control of depth, which is easier when the receiving partner sets the pace.
Friction. Natural lubrication varies with arousal, hydration, medication, hormonal state and cycle, and it decreases with time and with repeated withdrawal and re-entry. Friction pain is the most common avoidable kind and also the most easily solved. Use lubricant, and match it to the barrier method: oil-based products degrade latex.
No lubrication at all. The anal canal produces none. This is not a technique detail, it is anatomy, and it is why lubricant is a requirement rather than an improvement for anal sex, along with going slower than feels necessary. Saliva is not a substitute; it dries fast and offers no cushion. Pain during anal sex is a signal to stop, not to push through, because the tissue tears more easily than vaginal tissue and heals in an environment full of bacteria.
Load and posture. Standing, lifting, and any position held under muscular tension produce a different category of problem entirely: strained backs, cramped hips, joints that give out. These are the injuries most people actually experience, they are boring, and they are the reason porn's more architectural positions are shot in short takes. Hard floors add bruising and friction burn to the same list.
The distinction that matters
Situational pain has an obvious cause, appears once, and resolves when the cause is removed. Change the angle, add lubricant, slow down, move off the floor.
Persistent pain is a different thing. Painful intercourse that keeps happening — regardless of position, or every time, or with a partner it did not used to happen with — is a recognised clinical presentation with a long list of possible causes: pelvic floor muscle dysfunction, endometriosis, infection, skin conditions, vaginismus, scarring, hormonal changes, and effects of medication among them. None of those are fixed by trying a different position, and treating a symptom as a technique problem is how people spend years not getting help for something treatable.
If it is recurring, see a clinician. That is the whole of the advice this article is qualified to give.
What the old version of this article got wrong
It ranked positions by danger, assigned each one a scary anecdote, and framed the whole thing as something men do to women who then endure it. The practical content — go shallower, use lubricant, do not do it on a hard floor — was buried under that.
The better model: pain is information. It arrives fast, it is specific, and the correct response to it is to stop and say so. Every technical adjustment on this page is downstream of that one.