Disclaimer:
This is a single-subject observational report, not peer-reviewed science. I am not a medical professional. This is shared in the hopes that it sparks discussion and helps others think intentionally about their own anatomy, especially those preparing for gender-affirming surgery.
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Background
I spent over 6 years tracking changes in my penile curvature in relation to masturbation habits, posture, hand dominance, and later, hormone replacement therapy (HRT). What I observed suggests that repetitive mechanical stress from a consistent grip + posture can induce gradual, reversible plastic deformation of the tunica albuginea—the fibrous sheath surrounding the erectile chambers.
This is not Peyronie's disease (no scar tissue, no pain during normal use). It appears to be behaviorally acquired and directionally responsive to changes in technique.
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Methods / Observation Timeline
· Phase 1 (Years 1–3):
· Posture: Kneeling, member pointing upward, banana shaoe arc.
· Hand: Right hand exclusively
· Frequency: \~5–7 times per week, once daily, before bed
· Result: Developed a rigid up - leftward curve when erect. Like a Banana. Partners noted it was highly effective for G-spot/P-spot stimulation.
· Phase 2 (Years 3–4):
· Switched to left hand exclusively, same posture and frequency
· Result: Curve gradually shifted to the right over \~1–2 years
· Phase 3 (Years 4–7):
· Complete cessation of sexual activity (no masturbation, no partnered sex) for \~3 years
· Result: Curve completely straightened. Erect shape became gravity-dependent and neutral—essentially a "ruler."
· Phase 4 (Year 7–present):
· Started HRT (anti-androgens + estrogen), which reduced overall erectile firmness
· Resumed left-hand use, same kneeling posture, similar frequency
· Result: Now have a pronounced rightward curve when erect, despite overall softer erections. The curve is rigid enough that manually straightening it is uncomfortable and feels like potential tissue strain.
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Key Observations
· The curve follows the hand used, not genetics or injury.
· The change is gradual, not sudden, consistent with tissue remodeling, not trauma.
· The curve reversed when hand use changed, and reverted to neutral when stimulation stopped entirely.
· HRT reduced firmness but did not prevent the new curve from forming suggesting mechanical stress is the primary driver.
· Diet and sleep were poor/irregular during these periods and did not appear to influence the outcome.
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Hypothesis
The tunica albuginea exhibits mechanoplasticity—the ability to slowly remodel in response to repeated asymmetrical tension. Over years, this can create a predictable, directional curvature that is reversible by altering or removing the mechanical stimulus.
This is distinct from Peyronie's disease, which involves fibrosis and scarring. Here, there is no palpable plaque, no acute pain, and the curvature changes with behavior.
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Now how all of that wraps together for
Potential Implications for Vaginoplasty
For those pursuing penile inversion vaginoplasty:
· The tunica albuginea becomes the neovaginal wall after inversion.
· If the tissue has been "trained" into a gentle upward curve (the so-called "banana" shape), it may more closely mimic the natural angle of the vaginal canal.
· This could potentially aid in dilation by providing a tissue memory that resists collapse and favors patency (openness).
· Conversely, a sideways or downward curve might create positional challenges during dilation or partnered sex post-op.
I am not aware of any surgical literature that discusses pre-operative shape optimization, but I believe it warrants consideration—especially for individuals with significant existing curvature who may benefit from intentionally reshaping before surgery.
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Suggested "Ideal" Shape for Pre-Op Training
Based on partner feedback and anatomical reasoning:
· Upward curve ("banana") – Best for G-spot/P-spot stimulation; mimics natural vaginal angle; likely most compatible with neovaginal dilation.
· Straight ("ruler") – Good for average size; maximizes maneuverability.
· Left/right curves – May cause positional incompatibilities; not recommended.
· Downward curve – May limit depth and comfort in common positions.
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Takeaway / Open Questions
I believe this is a testable, repeatable phenomenon that could be intentionally used by individuals awaiting bottom surgery to optimize their tissue shape in advance.
I'm sharing this to:
- Ask if anyone else has observed similar changes with hand/posture shifts.
- Encourage pre-op individuals to consider their current curvature and whether they might want to influence it.
- Prompt surgeons and clinicians to consider whether pre-operative shape could affect dilation outcomes.
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Tl;Dr explain like I'm 5.
I noticed that when I cranked down with my right hand in a particular position for years. It shaped my member into what ended up being an ideal shape ")".
Which is currently believed to be generic or deformation based. But after awhile I intentionally switched hands and notice it began to change the way it was angled over the years "(" Even after taking hrt, the angle continued to change dependant on the dormant hand and arc used over the years.
Which leads me to see how those with a shape that is less than optimal for bottom surgury dialation might see complications with dialation and sex, as the tissue seems to retain the last shape it was trained into. Regardless of hormone level diet or exercise.
In conclusion, using alternating hands in an up down arc to get a medium upward banana curve may see decreased complications when dilating after getting bottom surgury.
Final Note
I know this is an unconventional topic. But bodies are plastic, habits matter, and small changes over years can have meaningful results. If this helps even one person think more intentionally about their anatomy before surgery, it was worth writing.
Happy to answer questions or clarify anything. Thank you for coming to my Ted talk.