Fantasizing About Someone Else in Bed
Fantasy is among the most common parts of sexual life, and also one of the least discussed. Imagining a scenario that differs from the present moment can heighten arousal, yet it can also raise awkward questions about loyalty, honesty and what a partner is owed.
One long-standing taboo concerns picturing another person while being intimate with a partner. Some people hold that exclusivity covers the imagination as well as the body, so that a mental detour counts as something close to cheating.
What an informal reader poll suggested
A sex-themed blog once ran an informal survey on the question. A clear majority of respondents, around two thirds, said that they do think of someone else during sex. Most of those pictured a real acquaintance rather than a celebrity or a made-up character, and nobody said the person in mind was someone they would rather be with.
About a quarter of respondents reported that they focus solely on their partner. The writer wondered whether that reflects exceptionally satisfying sex lives or a personal commitment to mental exclusivity. Online polls of this kind are self-selected, so they illustrate attitudes rather than measure how common the behaviour truly is.
When a fantasy is spoken aloud
The source imagined a familiar comedy moment in which a partner calls out the name of a movie hero or a public figure mid-act. Whether that ends a relationship depends heavily on how it is handled. Detailed praise of someone else's body can leave a partner feeling inadequate and may dent self-esteem.
Writers on the subject generally point to open, honest conversation as the thing that separates a harmless thought from a source of hurt. Discussing fantasies in a calm setting tends to feel different from having them revealed in the heat of the moment.
Ways couples sometimes use the topic
Some couples compare the people they imagine and learn what each finds exciting. Others turn that knowledge into role play or dirty talk. For some, simply knowing is enough, since it replaces guesswork with clarity.
Respect for limits runs through the discussion. A partner who is uncomfortable sharing fantasies is entitled to keep them private, and both people can still enjoy their own thoughts alone. The source summed this up by describing restraint and understanding as the strongest form of imagination.
Fantasy and fidelity
Opinions about whether mental infidelity exists are split. Some couples define faithfulness broadly and include thoughts, while others see fantasy as a private inner space that is separate from conduct. Neither position is universal, and individual couples often settle on their own working definition.
The source closed with a reminder that the person physically present is the one providing the touch, with imagination merely adding colour in the background.
Frequently asked questions
Is it common to think of someone else during sex?
Surveys and informal polls suggest many adults do. An online reader poll found about two thirds of respondents reporting it, though such polls are not representative.
Does fantasizing about another person count as infidelity?
Views differ. Some couples define fidelity to include thoughts, while many others regard fantasy as private and separate from behaviour.
Related reading
- Talking About Sexual Desires in Couples
An explainer on why sexual communication is hard for many couples, with common fears, frequent requests and counselling views.
- Monogamy, Fantasy and Unspoken Assumptions
A look at how couples define fidelity, why assumptions differ, and where fantasy about other people fits within monogamy.
- Age Gaps and Initiative in Intimate Relationships
A neutral look at how experience, age gaps and differing desire levels can shape who initiates sex in a partnership.
- Non-Consent Fantasies: What Is Known
A neutral overview of fantasies about being overpowered, how they are studied and the psychological explanations on offer.
- Meeting a Partner's Needs and Sexual Desire
How relationship researchers describe sexual desire over time and the idea of communal motivation in couples.
Updated November 2026. General information only, not medical, legal or professional advice. See the disclaimer and the medical disclaimer.