Sex

Scientists are using genetic sequencing to reconstruct how AIDS hit the United States in the 1970s and 1980s.

Genetic Sleuthing Clears 'Patient Zero' of Blame for U.S. AIDS Epidemic

Scientists debunk the myth of the man once thought to have brought the virus to the states

Fans cheer for Team Korea at the 2014 FIFA World Cup in Brazil.

Athletes Rejoice: Study Shows Sex Before Competitions Is Probably Fine

There's no evidence that getting down and dirty before sporting events has negative effects—and it may have benefits

The male brown widow spider may not be as unlucky in love as we once thought.

Male Widow Spiders Prefer Younger Ladies—So They Don’t Get Eaten

This strategy means they live to mate again, upending assumptions about these arachnids

A nesting male with a female in his nest.

Give it Up, Sneaky Males: These Lady Fish Have You Outwitted

Female ocellated wrasses have developed a surprising trick to control who fathers their offspring

Don't call her "baby."

Sorry, Sweetie: American Bar Association Bans Sexist Language in Court

Under a new rule, attorneys could be fined or suspended for using derogatory language while they practice law

Thanks, evolution.

The Evolutionary Reason Why Women Orgasm

New research suggests the female orgasm is tied to ovulation, not reproduction

A pair of Scinax alcatraz frogs discreetly lay their eggs in a water-filled plant.

When Frogs Pull the Curtain: The Benefits of Mating in Secret

Smithsonian's new curator of frogs explains why some frogs seek privacy when they mate

A male Bombay night frog getting his call on.

The Frog Kamasutra Gains a Chapter, Thanks to Camera-Wielding Biologists

One newly described sexual position for frogs could mean one giant leap for frog conservationists

Neisseria gonorrhoeae, the bacterium responsible for the sexually transmitted infection gonorrhea.

Gonorrhea Is Developing Antibiotic Resistance

And public health officials are scared of what comes next

An 89 year-old Korean 'comfort woman' Kim Bok-Dong protests in front of the embassy of Japan in Berlin to demand an official apology from Japan in September, 2015.

After 70 Years, Japan and South Korea Settle Dispute Over Wartime Sex Slaves

Even with this agreement in place, many are still seeking a better resolution

This yellow-bellied watersnake gave birth without male contact in the last eight years.

In Nature, Virgin Births Are Pretty Common

Fish do it, bugs do it, even some species of snakes do it

Male or female? Turns out there's no distinction.

There’s No Such Thing as a Male or Female Brain

When it comes to sex traits, brains are consistently inconsistent

It's getting too hot in here

Could Climate Change Mean Less Sex and Fewer Babies?

Even if it does, perhaps that's not a bad thing

Some Sexually Transmitted Microbes Might Be Good for You

There’s a whole lot of bacteria and viruses that pass from person to person, using any means they can find

Learning the value of sharing.

Want a Satisfying Sex Life? Try Being a Better Parent

Data suggest that splitting childcare duties often produces happier, more sexually satisfied couples

A satirical 16th-century print showing a chastity belt

Medieval Chastity Belts Are a Myth

People probably chuckled just as much then about the idea as they do today

The larger Pacific striped octopus uses unique prankster shoulder-tapping techniques to lure shrimp prey within arms' reach.

Tropical Octopus Definitely Mates Beak-to-Beak

Larger Pacific striped octopus couples engage in a host of behaviors unheard of among other octopuses

A stained tissue sample from 1967 reveals the presence of Chlamydia psittaci bacteria.

The Mystery of the Failed Chlamydia Vaccine

In the 1960s, a vaccine for chlamydia made patients more susceptible to chlamydia. Now scientists know why

The little blue pill is nothing like flibanserin, the sexual dysfunction drug for women recently approved by an FDA advisory committee.

Stop Calling Flibanserin "Female Viagra"

As the FDA weighs the merits of a new drug to boost female libido, it's clear this is not a little blue pill for women

Male wolf spiders vibrate dead leaves to create purring noises and court females.

Listen to the Dulcet Purr of a Wolf Spider

Males seduce females by making leaves vibrate

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