Evidence-based male sexual health
Separating science from locker-room lore — every myth tested against clinical evidence
Verdict: IT'S COMPLICATED
While emotional connection and sexual skill matter most, research shows some size preference exists. Women preferred slightly above-average for one-time partners (6.4" length, 5.0" girth) vs long-term (6.3", 4.8"). But 85% of women are satisfied with their partner's actual size, and girth matters more than length.
Sources: Prause et al. 2015, PLOS ONE; Lever et al. 2006
Verdict: BUSTED
While some small average differences exist between geographic populations, the within-group variation (>7cm range) is 15-30x greater than between-group differences. Most "racial size" data comes from unreliable self-reported surveys. Clinician-measured studies show minimal differences when controlling for measurement methods.
Sources: WHO Regions Meta-Analysis 2025; Veale 2015
Verdict: BUSTED
No oral supplement has been scientifically verified to permanently increase penis size. The male enhancement supplement industry is rife with fraud — the FTC and FDA have taken action against dozens of companies for false claims. Some supplements (L-arginine, ginseng) may improve erection quality, but none increase dimensions.
Sources: Mayo Clinic; FDA consumer warnings
Verdict: BUSTED
Despite claims of ancient Arabic origins, there are ZERO peer-reviewed clinical studies demonstrating jelqing increases penis size. The "evidence" comes entirely from anonymous internet forum posts with severe survivorship bias. Urologists warn it can cause Peyronie's disease, vascular damage, and decreased erection quality.
Sources: No supporting clinical evidence; multiple case reports of injury
Verdict: IT'S COMPLICATED
Natural growth ends after puberty (Tanner Stage V). However, clinical evidence shows traction devices can produce 1-3cm of length gain through mechanical tissue expansion (cytokinesis). Surgical options also exist. Weight loss can reveal buried shaft. But no pill, cream, or exercise has been proven to work.
Sources: Gontero 2009; Moncada 2019; RestoreX randomized controlled trial
Verdict: BUSTED
There is absolutely no scientific evidence that masturbation affects penis size in any direction. This myth likely stems from religious or moralistic traditions discouraging masturbation. Regular erections may actually be beneficial for penile tissue health.
Sources: No supporting evidence in medical literature
Verdict: BUSTED
Meta-analyses show sexual satisfaction depends far more on communication, emotional connection, attentiveness, and technique than on penis size. The majority of female orgasms are clitoral, not vaginal. Studies show most women prioritize partner confidence and skill over measurements.
Sources: Multiple sexual satisfaction meta-analyses
Verdict: IT'S COMPLICATED
Vacuum pumps produce TEMPORARY engorgement (increased size during and shortly after use). There is no peer-reviewed evidence that regular pump use leads to permanent size increases. They are medically validated for treating erectile dysfunction and post-surgical rehabilitation.
Sources: No peer-reviewed evidence for permanent gains
Verdict: BUSTED
Low-intensity shockwave therapy (Li-ESWT) has good evidence for improving ERECTION QUALITY (12 randomized controlled trials support this), but ZERO studies have shown it increases penile dimensions. Companies marketing it for "size gains" are being misleading.
Sources: Multiple systematic reviews on Li-ESWT
Verdict: CONFIRMED
The average erect penis is 5.1-5.5 inches (13-14 cm). Porn performers are selected for being significantly above average (typically 7-9 inches), and camera angles/positions further exaggerate size. Studies show porn consumption increases size anxiety and dissatisfaction in men.
Sources: Veale 2015; multiple media influence studies
Verdict: BUSTED
Penile Dysmorphic Disorder (PDD) is a recognized subtype of Body Dysmorphic Disorder (BDD). Men with PDD have penises within normal range but experience severe distress. Prevalence of BDD is ~1.9%. Treatment is CBT and SSRIs, NOT surgery (which often worsens distress).
Sources: Veale et al. 2015; ISSM guidelines
Verdict: IT'S COMPLICATED
Manual stretching has no clinical evidence. BUT medical-grade traction devices (which apply calibrated, sustained stretch) have clinical support for 1-3cm gains over months. The difference is controlled force over thousands of hours vs. 20 minutes of hand pulling.
Sources: Gontero 2009; RestoreX clinical trials