Keypoints Of ED
• An erection requires blood flowing into the penis at a rate high enough to overcome outflow. When trapped under adequate pressure, an erection occurs.
• The stimulus for a normal erection may be from sexual stimulation but may also occur from neurological signals during waking or sleeping hours.
• Spontaneous erections decrease with age. This should cause no concern as long as erections continue to occur during appropriate times.
• The role of testosterone in erections is complex, but it is mainly involved in maintaining libido.
• Orgasm is the pleasurable sensation associated with intense sexual stimulation. In men it is usually, but not always, accompanied by emission of semen into the urethra and a subsequent ejaculation of that semen. The same sensation occurs in women but without emission or ejaculation.
• Alfred Nobel refused to take nitroglycerin for his heart condition but instead used it to invent dynamite. He ironically used the resulting fortune to fund the peace prize that bears his name. The discovery of nitric oxide that eventually led to the development of Viagra for erectile dysfunction won the Nobel Prize. Just like Alfred Nobel, men who take Viagra should refuse to take nitroglycerin since the combination can be lethal. No one knows whether Alfred Nobel had erectile dysfunction.
