Skip to main content

Love & Passion Quote by Alfred Kinsey

"The only unnatural sex act is that which you cannot perform"

About this Quote

Kinsey’s line lands like a scalpel because it takes the era’s favorite moral category - “unnatural” - and strips it of metaphysics, leaving only anatomy and capacity. The intent isn’t just to shock; it’s to relocate the discussion from theology and policing to observation. In one sentence he converts “unnatural” from a condemnation into a practical impossibility, which is exactly the kind of reframing a scientist uses to puncture social panic.

The subtext is combative. Mid-century America treated sexuality as a courtroom where normality was the evidence and shame was the verdict. Kinsey flips the burden of proof: if adults can do it, it’s part of the human repertoire, not an offense against nature. That move also exposes how “unnatural” often functions as a euphemism for “socially disapproved,” a label that changes with fashion, class, gender roles, and whose pleasure is being centered.

Context matters because Kinsey wasn’t floating in abstraction; he was building his case from thousands of interviews that revealed how common supposedly rare behaviors were. His famous reports didn’t merely catalogue sex acts; they embarrassed the culture by showing that private life refused to obey public virtue. The line’s provocation is strategic: it collapses a moral hierarchy into a neutral baseline, daring critics to admit they’re not defending nature, they’re defending a social order.

It’s also a tell of Kinsey’s limits. By grounding ethics in feasibility, he sidesteps questions of consent, coercion, and harm - the issues that actually should distinguish acceptable sex from unacceptable sex. That omission is why the sentence still sparks: liberating in its de-shaming impulse, incomplete as a moral map.

Quote Details

TopicWitty One-Liners
SourceHelp us find the source
Cite

Citation Formats

APA Style (7th ed.)
Kinsey, Alfred. (2026, January 17). The only unnatural sex act is that which you cannot perform. FixQuotes. https://fixquotes.com/quotes/the-only-unnatural-sex-act-is-that-which-you-40959/

Chicago Style
Kinsey, Alfred. "The only unnatural sex act is that which you cannot perform." FixQuotes. January 17, 2026. https://fixquotes.com/quotes/the-only-unnatural-sex-act-is-that-which-you-40959/.

MLA Style (9th ed.)
"The only unnatural sex act is that which you cannot perform." FixQuotes, 17 Jan. 2026, https://fixquotes.com/quotes/the-only-unnatural-sex-act-is-that-which-you-40959/. Accessed 12 Feb. 2026.

More Quotes by Alfred Add to List
Kinsey on nature, stigma and sexual ethics
Click to enlarge Portrait | Landscape

About the Author

USA Flag

Alfred Kinsey (June 23, 1894 - August 25, 1956) was a Scientist from USA.

2 more quotes available

View Profile

Similar Quotes

John Henry Newman, Clergyman