Masters & Johnson & the Human Sexual Response
The 1966 Founding of Laboratory Sexology
Evidence grade 4 of 5, Strong. Read how the Atlas grades evidence.
The written rationale for this grade is still being prepared.
- FDA
- Not Applicable (research milestone)
Reference only. Not medical advice.
What can go wrong
This is a historical research entry. Their early conversion-therapy claims for homosexuality were later discredited and abandoned, a noted ethical blemish on an otherwise foundational body of work.
This is something to take to a clinician. The Atlas can tell you what is known about masters & johnson & the human sexual response in general. It cannot tell you what is happening in your body, and the difference matters most for exactly the symptoms that bring people to this page.
William Masters and Virginia Johnson's 1966 book Human Sexual Response was the first comprehensive laboratory study of the physiology of human sexual activity, based on direct observation and measurement of hundreds of volunteers. They described the four-phase sexual response cycle (excitement, plateau, orgasm, resolution) and corrected long-standing misconceptions. Their work founded clinical sexology and provided the physiological framework that later treatments for erectile and sexual dysfunction were built upon.
They put human sexual physiology under the microscope.
What people take it for
What it is taken for. Approval, where it exists, covers only some of these.
How it works
Through direct physiological measurement, Masters and Johnson characterized the vascular, muscular, and neurological events of sexual arousal and orgasm, providing the mechanistic baseline against which dysfunction, including erectile dysfunction, is defined and treated.
What people get wrong
Often saidVaginal lubrication originates from the cervix
ActuallyMasters and Johnson showed it arises as a transudate across the vaginal walls, correcting a long-held misconception.
Often saidSexual function ends with age
ActuallyTheir data demonstrated sexual capacity and response persist into old age.
Who profits, and who pushes back
Nobody is named here yet, because we have not done that work on this entry. Read that as unfinished. Somebody almost certainly sells this, and somebody almost certainly disputes it. Assume both until we have checked.
How we got here
Before the 1960s, the physiology of human sexual response was largely a matter of speculation and inference. William Masters, a gynecologist in St. Louis, set out to study it directly, recruiting Virginia Johnson as his research partner. Over roughly a decade they observed and instrumented hundreds of volunteers, by their account nearly 700 people, engaging in intercourse and masturbation in the laboratory, recording blood pressure, respiration, muscle tension, penile tumescence, and vaginal response. Their 1966 book Human Sexual Response distilled this into the four-phase model of the sexual response cycle: excitement, plateau, orgasm, and resolution. The findings overturned entrenched myths: they demonstrated that women could experience multiple orgasms, that sexual capacity persists into old age, and they clarified the mechanism of vaginal lubrication, debunking the idea that it came from the cervix. Written clinically for a medical audience, the book nonetheless became a bestseller and a touchstone of the sexual revolution. Their 1970 follow-up, Human Sexual Inadequacy, applied the physiology to treatment, founding modern sex therapy with structured behavioral techniques. Although their methods and some claims later drew criticism, Masters and Johnson established sexology as an empirical clinical discipline, the framework within which erectile dysfunction would later be understood and treated.
- 1957Masters begins laboratory study of sexual physiology
- 1964Masters and Johnson establish their research foundation
- 1966Human Sexual Response published, defines the response cycle
- 1970Human Sexual Inadequacy founds structured sex therapy
- 1990s-2000sTheir physiology framework underpins ED pharmacotherapy
At a glance
- Landmark book
- Human Sexual Response (1966)
- Authors
- William H. Masters, Virginia E. Johnson
- Volunteers observed
- Roughly 700 participants
- Response cycle phases
- Excitement, plateau, orgasm, resolution
- Follow-up volume
- Human Sexual Inadequacy (1970)
What this entry does not yet cover
What follows is unfinished work on our side, not a finding about Masters & Johnson & the Human Sexual Response. A short entry is not a safe entry.
- Cost and market. We have not documented what it sells for or who sells it.
- Supply chain. We have not mapped where it is made.
- Who uses it. We have not documented the user groups.
- What could change. No forward-looking summary yet.
- How it compares. We have not set it against the alternatives.
- Children and teenagers. We have not checked what is known about younger people.
- Where we land. We have not taken a position on this yet.
Sources
The studies below are named and described, but not linked. You cannot open them from here and check our reading against them, which means this page is our summary of the literature rather than a document you can verify. Weigh it accordingly until the links exist.
The studies that matter
Masters & Johnson, Human Sexual Response1966
First laboratory characterization of the human sexual response cycle
Masters & Johnson, Human Sexual Inadequacy1970
Established behavioral sex therapy for sexual dysfunction