Does Being Kinky Mean Something Happened to Me?
It's one of the most common assumptions people carry about kink, and often one of the quietest fears people carry about themselves: that an interest in BDSM must be traceable back to some past wound, some unresolved thing that found its way into the bedroom because it couldn't be dealt with anywhere else. It's a compelling story. It's also worth actually looking at what the evidence suggests, rather than what the assumption implies.
What the research seems to show, in more detail
Several studies comparing people who practise BDSM to those who don't have looked specifically at psychological functioning, personality, attachment, and trauma history, and the overall pattern across this body of research doesn't support the idea that kink signals damage.
One line of research has suggested BDSM participants are not more likely to have experienced past coercion, and some studies have found no clear association between BDSM interest and elevated psychological distress. Other research comparing standard personality measures between BDSM practitioners and non-practitioners has found practitioners scoring, on average, somewhat lower on neuroticism and somewhat higher on openness to experience, extroversion, and conscientiousness, alongside higher subjective wellbeing overall. Attachment research has looked in a similar direction, generally finding no evidence that a particular attachment style or insecure attachment pattern reliably predicts BDSM interest or role preference.
None of this suggests kink causes better psychological functioning, this research is correlational, so it can only describe patterns that occur together, not what's driving them. But it does mean the reverse claim, that an interest in kink is itself evidence of some earlier wound, doesn't hold up particularly well when it's actually tested against data, across a fairly wide range of studies, using different measures, in different countries.
That doesn't mean nobody who's experienced trauma is ever drawn to kink. Some people are, and there's nothing wrong with that either, a history doesn't disqualify a preference. It means the assumption running the other direction, treating kink as something that necessarily requires a wound to explain it, isn't supported by looking at kinky people as a group.
A tension worth naming, as someone trained in this field
Here's something I've noticed, and want to name carefully, since it comes from inside the discipline I trained in, not from outside it. Even research that sets out explicitly to destigmatise kink still tends to frame it as something requiring an explanation. Personality profiles, attachment patterns, sensation-seeking traits, coping mechanisms, these all get measured and discussed as though a preference like this can't simply exist on its own terms, as though there must be some underlying mechanism doing the explanatory work before the preference is allowed to just be valid.
I find myself wanting more from the literature than this, tentatively, as someone working within psychology rather than outside critiquing it. It's possible that some of what gets framed as "why kink" is really just "how personality and preference vary across a population," the same kind of variation we'd apply to any other interest without needing to trace a cause. A love of horror films doesn't usually get a personality-profile literature built around explaining it away. I don't think kink research needs to abandon rigour to move in this direction, but it might be worth psychology, as a field, sitting with the possibility that some preferences don't need a mechanism attached before they're taken seriously.
Where this assumption might actually come from
Probably a mix of things: cultural discomfort with sex and pain existing together outside of harm, decades of clinical and diagnostic framing that treated BDSM as pathology by default until relatively recently, and the simple pull of narrative, unfamiliar things tend to get explained by whatever story is closest to hand, and "something must have happened" is a very familiar story, one that shows up in reactions to plenty of things people don't understand yet.
What this might mean for you, specifically
If you're kinky and you've never experienced anything you'd call trauma, the weight of this research broadly supports that this is entirely unremarkable, nothing about your interest requires a backstory to make sense. And if you have experienced difficult things and you're also kinky, that doesn't require an explanation either, one doesn't have to account for the other, and there's no obligation to trace a line between them just because other people might expect one.
Where this leaves things
Kink doesn't need a backstory to be valid, and I'd like to see the research culture around it get a little more comfortable saying that plainly, rather than continuing to search for the mechanism underneath. Sometimes a preference is just a preference, and the discomfort other people, or even other researchers, feel about that isn't yours to resolve.