Index/People/Masters and Johnson

Masters and Johnson

Human sexuality research scientists William H. Masters & Virginia E. Johnson, 1957—1990s

Fact-Checks

47 results
Dec 17, 2025
Most Viewed

What is the average vaginal length and depth across different age groups in adult women?

The best available measurements place the typical adult vaginal depth (unstimulated, baseline) in the ballpark of about 7–10 cm (roughly 2.7–4 inches), with many studies reporting a population mean ne...

Dec 17, 2025
Most Viewed

What are normal ranges for vaginal length and depth in adult women?

Clinical and popular sources report wide variation in adult vaginal length, typically citing an average resting depth of roughly 2–5 inches (5–13 cm) with measurements that can shorten or lengthen wit...

Nov 24, 2025
Most Viewed

What are the most common vagina sizes in American women?

Research shows a wide range of vaginal dimensions rather than a single “most common” size: unstimulated vaginal depth is often reported around roughly 2.7–3.8 inches (≈7–9.6 cm) in several sources, wh...

Dec 7, 2025

what is the wide of the vagina opening before sexually aroused and after sexually aroused

Scientific literature and trusted health sources report that the vaginal canal is typically about 2–5 inches (5–13 cm) long at rest and lengthens substantially with sexual arousal — classic measuremen...

Dec 19, 2025

What is the average vaginal depth in inches for adult women overall?

The best-supported summary from clinical and popular medical reporting is that the average adult vaginal depth in a relaxed (unaroused) state is roughly 2 to 4 inches (about 5–10 cm), with commonly ci...

Dec 7, 2025

What is the average vaginal depth by age group in adult women?

Existing measurements of adult vaginal depth vary widely across methods and studies: common reported ranges cluster around about 2–5 inches (5–13 cm) in general-audience summaries (Medical News Today)...

Nov 24, 2025

How much does vaginal length and orientation change when a person becomes aroused?

Medical and sexual-health sources agree that the vagina both lengthens and widens during sexual arousal: typical unstimulated vaginal depth is often cited around 2–5 inches (roughly 5–13 cm), which co...

Nov 19, 2025

What is the average vaginal depth and how is it measured?

Published measurements vary, but most recent summaries and primary studies place average resting (unstimulated) vaginal depth roughly between about 5–8 cm (2–3.1 in) and commonly cite a broader practi...

Dec 13, 2025

Do women prioritize penis girth or length for sexual satisfaction across different ages?

Recent surveys and clinical guides indicate many women rate girth as equal to or more important than length for sexual satisfaction: several sources report girth is a stronger predictor or that many w...

Nov 29, 2025

What is the average depth of the adult human vagina and how does it change during arousal?

Research studies and mainstream health outlets report average adult vaginal depth commonly between about 2–5 inches (5–13 cm), with several sources citing averages around 3.5–3.8 inches (≈9–9.6 cm); o...

Nov 15, 2025

How much does vaginal depth change during arousal or orgasm?

Research and reputable sex‑health educators report that the vaginal canal typically lengthens during sexual arousal — commonly by about 1–2 inches (roughly doubling in some measures) as the cervix and...

Nov 20, 2025

What role do vaginal anatomy and partner compatibility play compared with penis size in sexual satisfaction?

Clinical and review literature shows that vaginal anatomy and partner compatibility generally predict sexual satisfaction more strongly than penis size alone: relationship factors, communication, and ...

Jan 19, 2026

What is the average vaginal depth across adult women overall?

Available anatomical studies report a typical resting vaginal depth in reproductively aged adult women clustering around roughly 6–10 centimeters (about 2.4–4 inches), with commonly cited averages nea...

Dec 14, 2025

What scientific studies link penis length or girth to female sexual pleasure?

Scientific studies show mixed evidence linking penis size (length and girth) to women’s sexual pleasure: some surveys and preference studies find modest preferences for larger girth or length in certa...

Dec 10, 2025

How does penis girth compare to length in predicting sexual satisfaction?

Recent surveys and clinical commentaries indicate penis girth is often cited as a stronger predictor of partner-reported sexual satisfaction than length, though results vary by study and population (e...

Dec 6, 2025

How does the male refractory period change with age from 20s to 70s?

Research and clinical summaries consistently report that the male refractory period lengthens with age: young men can recover in minutes while older men commonly need hours to a day or more (examples ...

Nov 24, 2025

How does penis girth versus length influence sexual satisfaction for women?

Available studies and surveys give mixed results: several peer‑reviewed studies and reviews conclude penis size is not the dominant determinant of female sexual satisfaction and that the vagina adapts...

Nov 20, 2025

What are the most common myths about penis size and female pleasure?

Many commonly repeated beliefs — that “bigger is always better,” that length is the key to female orgasm, or that porn sets realistic sexual norms — are contradicted or complicated by academic studies...

Dec 21, 2025

What is the average size of the vaginal introitus at rest and during arousal?

Most modern measurements place the vaginal canal’s resting length (cervix to introitus) at roughly 6–7 cm and the vaginal introitus (the external opening) as the narrowest transverse dimension at abou...

Nov 23, 2025

What are the phases of male sexual response and where does ejaculation fit in?

Medical and classical models describe the male sexual response in four main phases—commonly framed as desire (or appetitive), arousal/excitement (sometimes split into excitement and plateau), orgasm, ...