Almost everyone has fantasies they wouldn’t want read out. Surveys of sexual fantasy consistently find enormous variety and a large proportion of content that people describe as unwanted, embarrassing, or contradictory to their values.
The common conclusion — that a fantasy reveals a hidden truth about what you want — is the thing worth examining, because it’s mostly wrong.
What fantasy actually does
It isn’t a plan and it isn’t a preference statement. It’s closer to fiction: it works by intensity, taboo, novelty and the removal of consequence, and it draws on whatever produces charge rather than on whatever you would choose.
Several features follow from that. Fantasy frequently involves things you would find distressing in life — because the charge comes partly from the transgression, and the fantasy has no real consequences attached. It’s also frequently about being desired, or overwhelmed, or freed from responsibility, rather than about the specific content it appears to be about.
Which is why the most useful question isn’t what happens in it. It is: what is the feeling in it? People frequently discover the answer is being wanted, or being taken care of, or not having to decide — and that feeling is available in ways the literal content isn’t.
The particular anxieties
Fantasising about someone other than your partner. Extremely common, reported by the substantial majority of people in long relationships, and not predictive of infidelity.
Fantasies involving force or non-consent. Common, including among people who have experienced assault, and a source of enormous private distress. It isn’t a desire for the real thing. The fantasy is authored by you, controlled by you, and stoppable by you, and those are the exact features the real event lacks.
Fantasies that don’t match your orientation. Also common, and a poor indicator of anything.
The exception that matters
There’s one situation where distress about sexual thoughts is a different problem, and it’s worth knowing about because the treatment diverges completely.
If the thoughts are unwanted — arriving intrusively, horrifying rather than arousing — and you are checking your own body for a response, seeking reassurance, researching what they mean, or avoiding situations because of them, that pattern is OCD rather than fantasy.
The distinguishing feature isn’t the content; it’s the relationship to it. Fantasy is enjoyed, however guiltily. Obsessions are dreaded. And the checking is the mechanism —attention to any body region produces sensation, which is then read as evidence.
That needs exposure and response prevention, not exploration. Working on it as fantasy makes it worse.
Sharing them
Optional, and not always advisable. The useful question is what you want from telling — closeness, or the thing itself, or relief from carrying it. Those want different conversations.
If you do share, share the feeling rather than the script. “I like feeling wanted like that” travels considerably better than a scene, and it’s closer to true.
The line
Everything here concerns thoughts. Thoughts aren’t actions, and none of this extends to anything involving a person who can’t consent. That isn’t a fantasy question and it needs professional help rather than a webpage.