Post-Exposure Prophylaxis (PEP) (Last updated 8/30/2016; last reviewed 8/30/2016) Key Points Post-exposure prophylaxis (PEP) involves taking antiretroviral (ARV) medicines very soon after a possible exposure to HIV to prevent becoming infected with HIV. PEP should be started as soon as possible to be effective and always within 72 hours (3 […]

Debby Herbenick, PhD, MPH is co-Director of The Center for Sexual Health Promotion at Indiana University’s School of Public Health-Bloomington, a sexual health educator at The Kinsey Institute, and author of five books about sex and love. Her most recent is Sex Made Easy: Your Awkward Questions Answered for Better, Smarter, Amazing Sex (Running Press, 2012).

A sexual problem, or sexual dysfunction, refers to a problem during any phase of the sexual response cycle that prevents the man or couple from experiencing satisfaction from the activity. The sexual response cycle has four phases: excitement, plateau, orgasm, and resolution. While research suggests that sexual dysfunction is common […]

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