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A member asked:
Why is my penis so small flaccid but grows a lot when erect?
A doctor has provided 1 answer
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.
Answered 4/14/2016
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