WebMD explains the parts of a penis, how you get an erection, and how ejaculation happens.

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WebMD answers frequently asked questions that a teenage man may have about his penis.

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Priapism is a condition in which a penis remains erect for hours in the absence of stimulation or after stimulation has ended. There are three types: ischemic (low

The penis has three chambers, two large ones at the top, these are the erectile tissues known as the Corpora Cavernosa, and one smaller chamber at the bottom for

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