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Sexual health and LGBT population
Living with HIV
Post-exposure prophylaxis (PEP)
ED is the inability to achieve and/or maintain a quality erection for fulfilling sexual activity. An erection must be stiff or tumescent enough to be able to penetrate the mouth, vagina or anus. It is important to note that anal penetration requires a more turgid penis (stiffer erection) as the penis must penetrate the strong anal sphincter muscles. When impotence occurs solely in the face of anal penetration, this is a particular form of ED. In some forms of ED, the man is able to achieve erection and penetrate, yet loses his erection as coitus and climax are pursued.