Sex

Teen Pregnancies Have Hit an All-Time Low

But teens still aren’t opting for the most effective forms of birth control

Who wouldn't love that face?

Lady Wolf Spiders Use Silk to Flirt

Counter to the common wisdom, it’s not just males that do the pursuing

Members of the Xhosa tribe, like the young initiates seen here in Khayelitsha, are among the South African groups that practice ritual circumcision. The affiliation of the young man who received a transplant is not known.

The Trickiest Part of a Penis Transplant? Finding a Donor

The doctors who announced the first successful procedure last week had a particularly difficult time finding willing organ donors

An African cotton leafworm moth.

These Moths Remember Where They Mated for the First Time

The locale of the African cotton leafworm moth’s first experience pairing up forms its future preferences, a new study shows

A male houbara bustard putting on an infinitely sexy "booming" display to impress the ladies.

Old Male Bustards Have Less Desirable Sperm

Male birds don’t just lose their female-wooing prowess as they age, but also their ability to sire healthy chicks

Journey back to the Paris of the Marquis de Sade by strolling around the Marais, one of the city's oldest neighborhoods.

Tour Paris With the Marquis de Sade as Your Guide

Traces still remain in the City of Love of the famed author and sex icon

Dumpling squid don't let danger stop them from mating.

Threat of Being Eaten Doesn’t Deter Dumpling Squid From Sex

The adorable cephalopods seem to rate mating higher on their list of priorities than survival

When Sperm Meets Egg, Zinc Sparks Fly

Billions of tiny zinc particles explode from the surface of mammalian eggs when a sperm cell touches down

Antarctic Seals Keep Trying to Have Sex With Penguins

This isn’t the first time a fur seal has attempted to copulate with a king penguin and scientists think that more seals are learning the behavior

These are a pretty good idea regardless.

Scientists Are Pretty Sure Survivors Can't Transmit Ebola Sexually

Research suggests Ebola survivors aren't infectious, but scientists aren't ruling it out

A shrine marking London's Cross Bones Graveyard.

The London Graveyard That’s Become a Memorial for the City’s Seedier Past

Thousands of bodies from London’s first red light district are buried beneath a lot in the South Bank, an area under massive redevelopment

An artist's impression of an antiarch mating scene.

A Very Ancient Group of Jawed Fish Were Having Surprisingly Intimate Intercourse

Many fish later ditched this clumsy method in favor of external fertilization

Matt Dean (left) and Jim Dines (right) analyzed pelvic bones of whales and dolphins from 29 different species.

Promiscuous Whales Make Good Use of Their Pelvises

Hips don’t lie: Whale pelvic bones are not vestigial but instead evolved to help the marine mammals maneuver better during sex

Approximately a Third of Americans Have Been the Victim of Sexual Violence

The CDC's latest rape and sexual violence statistics are just as disturbing as ever

Lady Worms, Beware: Pick the Wrong Mate, End Up Dead

Sperm from the wrong species of worm will eat through a female worm's innards

These Sexy Geckos are Lost in Space

These lizards have been accidentally left to fornicate all alone among the stars

This Tiny Implant Could Provide Remote-Control Birth Control for 16 Years at a Time

Microchip implants under the skin could last for 16 years

Some World Cup Teams Ban Sex Before Games, Even Though Science Says It May Help Performance on the Field

Other teams, however, are all in favor of pre-game sex

Female Pigs Respond Differently to Batches of Sperm Carrying Mostly X Or Mostly Y Chromosomes

In an experiment, mother pigs' gene expression changed depending on the sperm type they were fertilized wtih

The sperm cells were found in Riversleigh, a remote spot in northwestern Australia that was once a teeming rainforest.

Giant Sperm Cells Belonging to 17 Million Year Old Shrimp Are the Oldest Ever Found

The sperm were longer than the male shrimp's entire body

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