2 doctors weighed in:

Why is my penis so small flaccid but grows a lot when erect?

2 doctors weighed in
Dr. George Klauber
Pediatrics - Urology
1 doctor agrees

In brief: From empty to full

A flaccid penis has empty corpora cavernosa (penile dods), with erection these fill with blood.
Penis becomes inflated and thus is much larger when erect. Analogy is filling a balloon with air.

In brief: From empty to full

A flaccid penis has empty corpora cavernosa (penile dods), with erection these fill with blood.
Penis becomes inflated and thus is much larger when erect. Analogy is filling a balloon with air.
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