How much curve is too much? The science of penile shape and Peyronie’s
Dr. Alexander Grant, MD, PhD: Urologist & Men's Health Advocate
Jan 12, 2026 · 9 min read
Most men are not arrow-straight, but a sudden change in shape can signal an underlying condition. Here is the evidence-based guide to distinguishing normal anatomy from medical concern. “A curved penis is rarely a perfect cylinder. Most men have some degree of mild curvature, often to the left or right, which is completely benign. The ...