Here's what is known about human sex and sexuality in the physical, mental and emotional realms. LiveScience examines the latest psychological, biological and sociological studies on sex, ranging from dating and mating, to flirting and cheating, to birth control and STDs.
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3 Reasons You Might Hate Valentine's DayValentine's Day may be one of the most polarizing holidays on the calendar. Here's why it's hated.
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Syphilis Cases Surge Among US Newborns, Reaching 20-Year HighA resurgence of syphilis in the United States has led to a dramatic spike in cases of the disease among newborns, according to a new report.
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WWI POW's Romantic Engraving Discovered 100 Years LaterMore than 100 years ago, a Russian soldier held captive in a prisoner-of-war camp engraved a beautiful scene on an aluminum canteen showing two people, deeply in love, snuggling together.
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Video Shows How HIV Infects Cells During SexA new video shows the virus passing from an infected cell into a new host, as it would during sexual transmission.
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You Have a Second Immune System, and It Might Be Ruining Your Love LifeIn the battle against germs, your immune system is the best wing-man there is. When it comes to dating? Not so much.
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UK Man with 'Worst Ever' Drug-Resistant Gonorrhea Is Now CuredThe U.K. man who caught the "worst ever" case of antibiotic-resistant gonorrhea has been cured.
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Gonorrhea's Always Bad, But This Man's Case Might Be the 'Worst Ever'
This could be the "worst ever" case of antibiotic-resistant gonorrhea that doctors have seen.
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Here's How Many Americans Now Have HerpesHerpes infections have declined in the United States in recent years, according to a new report.
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Why Sniffing Your Partner's Shirt Helps Reduce StressIf you're feeling stressed, a whiff of your romantic partner's shirt may help you feel more relaxed, a new study shows.
