erection (physiology) -- Britannica Online Encyclopedia
Britannica online encyclopedia article on erection (physiology), enlargement, hardening, and elevation of the male reproductive organ, the penis. Internally, the penis has three long masses of cylindrical tissue, known as erectile tissue, that are bound together by fibrous tissue. ... physiologyalso called Penile Erection,
HowStuffWorks "The Penis"
The penis handles two tasks: urination and ejaculation. See diagrams of the penis anatomy and learn how erections and erectile dysfunction work. ... When a doctor wants to know whether a patient's difficulty achieving an erection is due to physical or mental reasons, one way to find out is to fit the patient's penis with...
Erection - Wikipedia, the free encyclopedia
An erection of the penis, clitoris or a nipple is its enlarged and firm state. It is the result of a complex interaction of psychological, neural, vascular and endocrine factors, and is usually, though not exclusively, associated with sexual arousal.
maintaining erection
Erection can occur throughout life, happening before birth and into the 90's in healthy men. Nocturnal erections occur during all male dreams (regardless of what the dream is about), unless the man has physical problems (this is the easiest way to determine if impotence is physical or emotional in nature).
Erection
It becomes stiff and stands up: he has an erection. Once a guy has a hard on he can have intercourse. How does it work?; Four stages of a hard on; Spontaneous erections; Nocturnal erections; ... See also: morning erections, erection problems...
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