All About Sex

The best sex ever

Michael Castleman M.A.

Want Better Sex? Get More Sleep

Want better sex? Get more sleep. Chronic sleep deprivation is common and hurts libido and sexual function.

What Proportion of the Coupled Population Cheats?

Some say it is time to rethink monogamy.

SexSmart Films: The Best Source of Non-Porn, Sex Videos

SexSmartFilms is the best source of non-porn, sex education videos. Founder Mark Schoen, Ph.D., has collected more than 600 sexuality videos—all worth watching.

How Long Does It Take Women to Climax During Intercourse?

A study timed how long it took 645 women to climax during intercourse. For those who did, times varied. But two-thirds of the women—69 percent—never had orgasms during intercourse.

The One and Only Universally Valid Sexual Generalization

We're obsessed with what's sexually "normal." But recent research teaches us to expect the unexpected. because we're all sexually unique.

Condom-Related Erection Problems Can Easily Be Prevented

Among men who use condoms, one quarter experience condom-related erection difficulties. Fortunately, the problems can almost always be resolved quickly and easily.

The Single Most Fundamental Sexual Skill

Most sex educators say self-sexing is a personal choice, that it's fine to do it or not to. Actually, solo sex should be promoted. It's the basis of joyous partner lovemaking.

Death by Sex: How Lovemaking May Prove Fatal

Death by sex? It's rare but possible. These four sex-related activities in particular may prove lethal.

How Much Time Does the World Spend Watching Porn?

How much time does the world spend on Internet porn? Depending on your perspective, porn is either a black hole that sucks people—mostly men—into oblivion, or a brief coffee break.

Expert Advice for Better Sex, Despite the Pandemic

A sex therapist offers suggestions for sexual enhancement now, or any time.

Polyamory Has Become a Little More Mainstream

This past summer, Somerville, Massachusetts became the first and only U.S. city to expand its domestic partnership ordinance to include multi-partner—polyamorous—groups.

The Best Way to Cure Premature Ejaculation

Premature ejaculation is men's #1 sexual complaint. Of the four ways to treat it, only one teaches men to last as long as they'd like, whether that's 10 minutes or two hours.

Attention Men, Intercourse Alone Brings Few Women to Orgasm

Attention men, intercourse alone brings surprisingly few women to orgasm. For women’s sexual satisfaction, your penis is less important than your fingers and especially your tongue

Fertility Awareness: Prevent or Promote Pregnancy, Naturally

Fertility awareness is an easy, scientifically sound way to track women's fertility, and promote or prevent pregnancy. It's a big improvement on calendar rhythm birth control.

The Three Types of Sex: How Many Do You Engage In?

Sex comes in three varieties: procreative, relationship-affirming, or recreational. Since Biblical times, one has been very controversial. 

The Latest on the Sexual Effects of Marijuana

A small but growing research literature shows that around two-thirds of people call marijuana sex-enhancing. Two recent studies agree.

Since Covid, Lingerie Sales Have Soared

Since the pandemic, lingerie sales have soared—especially the raciest items.

The Connection Between Erections and Gum Disease

Many men are not committed to dental health. Big mistake. Chronic gum disease is a newly identified risk factor for erection trouble.

This Is Why Many Women Watch Porn

Why is almost one-third of the porn audience female? Some watch to satisfy curiosity, others due to feminism, lust, or for sexual spice. But most watch for another reason. 

What Good Is School-Based Sex Education?

School-based sex education classes fail to reduce teen pregnancies and STIs. Instead, another approach succeeds: parents discussing sex with their kids.

Why Do Only Half of Women With Sexual Pain Tell Their Lovers?

Only half of women mention sexual pain to male lovers. They may believe sex is about “his needs, not mine.” Gentlemen, for great sex, understand women's sexual pain, and ask about it.

Attention Men: Special Nerves in the Skin Can Help You in Bed

Special touch-sensitive C-tactile nerves can help men last longer in bed, while simultaneously enhancing women's arousal and interest in sex.

Older Adults Reveal What Produces Great Sex 

A recent study describes how satisfied seniors maintain high-quality lovemaking. Their strategies apply to lovers of all ages.

22 Risk Factors for Erection Trouble: How Many Can You Name?

Erectile dysfunction doesn’t just happen. It has 22 risk factors. But many people can't name any, and few know more than one or two. You?

No “Typical” Vulvas: Appearance and Dimensions Vary Widely

Research finds that healthy female genitalia vary greatly in appearance.

The Real Hazards of Penis Surgery

Surgery to increase penis size or treat erectile dysfunction has been reported to cause unsightly genital deformities and other potentially serious problems.

Record Numbers of Young—and Old—Adults Report No Partner Sex

Since 1992, the proportion of celibate young adults has almost tripled, and American adults of all ages report less partner sex.

Drugs for Premature Ejaculation: Most Men Soon Quit Them

The drugs prescribed to treat premature ejaculation help only a minority of men, and most quit taking them within a year.

Why Older Women (Cougars) Seek Sex With Younger Men (Cubs)

Why do some older women pursue relationships with significantly younger men? According to a recent study, a key reason is better sex.

Sterilization: Why Do More Women Than Men Opt for It?

Sterilization is the nation's most popular method of birth control. Male sterilization is quicker, cheaper, and easier, but women get sterilized more often than men.

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