Better sex. Increased vitality. More muscle. Improved health. Greater mental agility. These are just a few of the life-enhancing benefits that men with low levels of testosterone can experience when they increase their testosterone levels. If you've noticed a decrease in your sex drive, experienced erectile dysfunction, or felt tired, depressed, and unmotivated, this authoritative, up-to-date guide from an expert at Harvard Medical School will help you determine if you have low testosterone - a surprisingly common but frequently undiagnosed condition among middle-aged men.

When high speed Internet became widely available a few years ago, growing numbers of people began to worry that their porn use was running out of control. Far from preparing them for fulfilling relationships, viewing an endless stream of porn videos led to unexpected symptoms.

Since Darwin's day, we've been told that sexual monogamy comes naturally to our species. Mainstream science - as well as religious and cultural institutions - has maintained that men and women evolved in families in which a man's possessions and protection were exchanged for a woman's fertility and fidelity. But this narrative is collapsing....

An astonishing new science called neuroplasticity is overthrowing the centuries-old notion that the human brain is immutable. Psychiatrist and psychoanalyst, Norman Doidge, MD, traveled the country to meet both the brilliant scientists championing neuroplasticity and the people whose lives they've transformed - people whose mental limitations or brain damage were seen as unalterable.

The father of three sons, a journalist, and a Brookings Institution scholar, Richard V. Reeves has spent twenty-five years worrying about boys both at home and work. His new book, Of Boys and Men, tackles the complex and urgent crisis of boyhood and manhood. Reeves looks at the structural challenges that face boys and men and offers fresh and innovative solutions that turn the page on the corrosive narrative that plagues this issue. Of Boys and Men argues that helping the other half of society does not mean giving up on the ideal of gender equality.

What makes love last? Why does one couple stay together forever, while another falls apart? And most importantly, is there a scientific formula for love? Drs. John Gottman and Julie Schwartz Gottman are the world’s leading relationship scientists. For the past forty years, they have been studying love. They’ve gathered data on over three thousand couples, looking at everything from their body language to the way they converse to their stress hormone levels. Their goal: to identify the building blocks of love.

The study of sexual physiology has been a paying career or a diverting sideline for scientists as far-ranging as Leonardo da Vinci and James Watson. The research has taken place behind the closed doors of laboratories, brothels, MRI centers, pig farms, sex-toy R&D labs, and Alfred Kinsey's attic.

Mary Roach, "The funniest science writer in the country", devoted the past two years to stepping behind those doors. In Bonk, Roach shows us how and why sexual arousal and orgasm can be so hard to achieve and what science is doing to slowly make the bedroom a more satisfying place.

Why are women more verbal than men? Why do women remember details of fights that men can't remember at all? Why do women tend to form deeper bonds with their female friends than men do with their male counterparts? These and other questions have stumped both sexes throughout the ages. Now, pioneering neuropsychiatrist Louann Brizendine, M.D., brings together the latest findings to show how the unique structure of the female brain determines how women think and what they value.

If you think sex education is still about the birds and the bees, think again. And it's not about science either. In her shocking exposé, You're Teaching My Child What?, Dr. Miriam Grossman rips back the curtain on sex education today, exposing a sordid truth. Today's sex ed programs aren't based on science; they're based on liberal lies and politically correct propaganda that promote the illusion that children (yes, children) can be sexually free without risk.

After 20 years of private obstetrics and gynecological practice, there’s nothing Dr. Jackie Walters hasn’t seen. And now, in her new audiobook, the widely-adored OB-GYN invites you to put your feet in the stirrups and investigate. Whether she’s covering libido, contraceptives, labiaplasty, or fertility, Dr. Jackie educates listeners with her characteristic grace and pragmatism. Both funny and informative, she brings you on a quest through the female reproductive system - answering all the burning (and itching, and smelling...) questions you’ve always been afraid to ask.

The Latin term for the female genitalia, pudendum, means “parts for which you should be ashamed”. Until 1651, ovaries were called female testicles. The fallopian tubes are named for a man. Named, claimed, and shamed: Welcome to the story of the female body, as penned by men. Today, a new generation of (mostly) women scientists is finally redrawing the map. With modern tools and fresh perspectives, they’re looking at the organs traditionally bound up in reproduction—the uterus, ovaries, vagina—and seeing within them a new biology of change and resilience.

Many women still suffer a long-ingrained dissociation with their own vaginas and a misunderstanding of what goes on "down there". With expertise and a dose of humor, leading ob-gyn, educator, and women's health advocate Dr. Sherry Ross addresses every urgent, confounding, culturally taboo or embarrassing question women have about vaginas, with the goal of healthier, happier lives for all.

Miriam's doctor didn't believe she had breast cancer. She did. Sophie navigates being the only Black scientist in her lab while studying the very disease, HIV, that she hides from her coworkers. For Victoria, coming out as a transgender woman was less difficult than coming out as bipolar. Michele Lent Hirsch knew she couldn't be the only woman who's faced serious health issues at a young age, as well as the resulting effects on her career, her relationships, and her sense of self. What she found was a surprisingly large population with important stories to tell.

A candid companion to the best-selling guide for women, The Good Guy's Guide to Great Sex gives you suggestions for a fulfilling sex life for both you and your wife, whether you're just starting out or simply want to make your sex life what you've always hoped it would be and aren't sure how to get there.

In the fall of 2010, Abby Norman's strong dancer's body dropped 40 pounds, and gray hairs began to sprout from her temples. She was repeatedly hospitalized in excruciating pain, but the doctors insisted it was a urinary tract infection and sent her home with antibiotics.