An explanation of how the word abstinence is used, and what it refers to.
Definition of acrotomophilia, which describes being sexually aroused or having sexual fantasies about having sex with someone who has an amputated limb.
How old do you have to be to qualify as an adult virgin?
What is the definition of adultery?
Defining agalmatophilia, a fetish that involves arousal or sexual excitement for statues for mannequins.
Definition of agoraphilia which describes sexual excitement from being outdoors and/or enjoying sex in public places.
Description of anal beads, also known as “Thai beads”.
Description of anal dildos.
Definition of the word analingus, also called rimming.
Androgynous has more than one definition, and here are a few common ways that it is defined.
Definition of anorgasmia, an inability to reach orgasm or climax.
Scientific and cultural definitions of asexual.
Definition of asphyxiophilia, the practice of depriving oneself of oxygen to create sexual arousal or enhance sex.
A description and definition of autofellatio, the act of performing oral sex on oneself.
Explains what an avatar is in the context of sex tech and human computer sexual interactions.
A definition for the term BDSM which is an umbrella term to describe a wide range of sexual activities, and emotional and spiritual interactions.
A definition of the term bestiality.
How do you define bisexuality?
Explains what “bot” software is, in the context of sex tech.
What is a butt plug harness?
Definition and description of butt plugs.
Definition of candaulism, which describes the sexual practice involving three people where two engage in sex while the third watches, often from a hidden location.
How researchers have chosen to define casual sex, and proposing a non-scientific definition of casual sex.
A definition of celibacy and explanation of how celibacy differs from chastity and abstinence.
Explains some possibilities of what being a certified sexuality educator might mean.
Traditional and contemporary definitions of the term chastity.
How do you define cheating in a romantic, committed relationship?
Chlamydia symptoms and links to more resources on Chlamydia and other sexually transmitted diseases.
A definition of the term cisgender, with links to further readings.
An explanation of Climacturia, a medical term describing orgasm-associated incontinence.
About Coccinelle, well known female performer who was also the first person to have sex reassignment surgery in France.
A definition of the word coitus.
A definition and explanation of the idea of compulsory monogamy.
Definition of the fetish or paraphilia known as coprophilia.
A definition of the term cuckold.
An explanation of the term cuddle party, with links to more information on cuddle parties.
Find out how sex and sexuality are defined differently and how those difference impact your experience of sex.
Explains what a dental dam is in the context of using dental dams for safer sex.
Definition of the term devotees which refers to people who fetishize or have a specific sexual interest in someone with a disability.
Definition of the sex toy called a "dildo."
Brief biography for Dr. Geri Weitzman.
Information about pioneering sex researcher Dr. John Money.
About sex reseacher and historian Vern Bullough 1928-2006
Explains the Diagnostic and Statistical Manual of Mental Disorders (DSM).
Definition of dual action vibrator
Definition of Dysparuenia or painful intercourse.
Describing the sexual activity edging.
Definition of the term emergent sex, coined by Brenda Brathwaite.
Definition of the term erectile dysfunction.
Definition of erogenous zones, and a list of some of the common erogenous zones.
Definition of the personality dimension called erotophilia and erotophobia.
Definition of the various kinds of female genital cosmetic surgeries, including vagioplasty and labiaplasty.
A definition of female orgasmic disorder.
A definition of female sexual dysfunction including common critiques of the term itself.
Clinical and non-clinical definitions of fetish.
What is fetish sex, and can it be part of a healthy sex life?
Explanation of foot fetish and the various forms it takes.
A definition of the term foreplay.
Definition of Frenulum Breve a condition that can make sexual activity painful.
About Fritz Klein, sex researcher, psychiatrist, and bisexual activist.
Definition of the sexual activity frottage.
A definition of gender in the context of sexuality and sexual health.
A definition and explanation of common mistakes when using the term gender neutral.
Many prefer the term gender independent children, but both terms are used to describe the ways that social and cultural expectations can clash with a child's predictable gender exploration.
What does the term gender variant mean?
What genderqueer means, and who the term applies to.
Offers a general definition of genetic determinism, in the context of research in human sexuality.
Genital herpes symptoms and links to more resources on genital herpes and other sexually transmitted diseases.
Are some kinds of sex more heternormative than others?
A working definition of homophobia in the context of sexual health.
Describes the definition of physical, biological, or genetic sex, as determined by anatomy and chromosomes.
A definition of the hymen and it's relationship to virginity.
Describes a proposed new sexual disorder for the DSM called Hypersexual Disorder
Definition of the clinical diagnosis of hypoactive sexual desire disorder, where an individual has low or no interest in sexual activity or fantasy.
Definition of the term impotence.
Definition of incontinence.
Definition of infidelity in the context of a sexual or romantic relationship.
Comparing different definitions of sexual betrayal.
A definition of the word intercourse in a sexual context.
Some historical context and an explanation of the term intersex.
An explanation of how the terms male and female sexuality are used on About.com.
Definition of Kegel exercises, used to strengthen the pelvic floor muscles.
What defines kinky sex?
An explanation of the Kinsey Scale proposed by sex researcher Alfred Kinsey.
Definition of klismaphilia, or deriving sexual arousal and pleasure from enemas.
A definition of the inner and outer labia.
Definition of labiaplasty, surgery to alter the size of the labia.
Definition of the rare disorder lichen sclerosus
A definition of mainstream, as opposed to independent, pornography.
A definition of male orgasmic disorder.
What is a male strap on, and why would men want or need to use a strap on sex toy?
Explanation of the category of male vibrator, with links to information on male sex toys, how to use vibrators for men, and top men's sex toys.
Definition of the term marital aid
Definition of the term masturbation.
Explanation of medical fetish.
A definition of the term medical model as it applies to an understanding of sexuality.
A definition of monogamy.
Definitions of biphobia and monosexism, and an explanation of the relationship between the two.
Learn more about the largest ongoing collection of data in the U.S. related to families and sexual health.
Definition of non-ejaculatory orgasm, a term generally used when refering to male orgasm and the experience of male multiple orgasm.
Brief definition of the term non-monogamy, with references to alternative relationships and polyamory.
There isn't only one definition of normal sex. Here are the four most often referred to.
What's the difference between an open relationship and cheating?
What makes up the taste of oral sex? An explanation of what oral sex taste is comprised of.
Explanations of the various definitions of orgasm.
Definition of the term Pansexual.
Definition of paraphilia.
What is penile dysmorphophobia?
Explains what a penile prosthesis is, why men would use them, and how they work.
What is involved in penile rehabilitation?
There are products that can be used as a penis limiter, effectively controlling the depth of penetration during intercourse.
Describes the basics of penis pumps and the difference between penis pumps and vacuum pumps or vacuum erection devices.
Explains what the perineum is and where to find it.
Definition of persistent genital arousal disorder (PGAD), also known as persistent sexual arousal syndrome (PSAS).
Definition of persistent sexual arousal syndrome (PSAS), also known as persistent genital arousal disorder (PGAD).
Definition of phimosis, a condition where the foreskin cannot be pulled back behind the head of the penis
Explains what phthalates are and how they are used in sex toy manufacturing.
A definition and description of play piercing.
A definition of pre-cum, or pre-ejaculatory fluid, which is expelled from the penis during sexual arousal and prior to ejaculation.
Definition of premature ejaculation
Definition of the condition priapism.
What does the non-tech PDA stand for?
Definition of the Pubococcygeus Muscles, known as the PC muscles.
Brief historical and contemporary definitions of the word queer, in reference to sexuality and gender.
Definition of the term Rainbow Parties.
Provides a definition of the term refractory period.
Describes the little known profession of romantic product salesmen.
What is semen, and what is it made of?
Describes what the term sex coach refers to, and what a sex coach does.
Defines the term sex drive, also known as sexual instinct or libido.
Offers a definition of sex educator as well as how other people use the title sex educator.
What defines a sexual hangup?
Defnition of the term sex positive.
What is a sex professional? What makes someone a sex professional?
An explanation of the term sex researcher.
A definition of the term sex tech.
An explanation of what a sex therapist is, and what they do.
What is the definition of a sex toy? How are sex toys defined in law, by public health, and by commerce?
Explains how sex work is commonly defined, and what the difference is between the term sex work and the term prostitution.
An explanation of the term sexologist.
An explanation of the term sexology
A definition of sexual arousal.
A definition of sexual behavior may seem obvious at first, but not everyone agrees on what is, and isn’t, sex.
How can you define sexual compatibility?
A definition of sexual desire.
What is the definition of a sexual dysfunction?
Explains what is included in a definition of sexual expression.
A definition of sexual health.
How does sexual identity differ from sexual orientation, or sexual behavior? Here’s a working definition of sexual identity.
There’s no one way to define sexual intimacy, but here’s a definition offered as a place to start defining sexual intimacy for yourself.
Historically, researchers have conceptualized sexual orientation in a variety of different ways. Here is a practical definition of sexual orientation.
Definition of the term sexual performance anxiety.
A definition of sexual pleasure.
What is the definition of a sexual problem?
Readers share definitions of what makes something a sexual problem.
What is sexual surrogacy and who are sexual surrogates?
Explanation, prevalence, and theories regarding sexsomnia, or sleep sex.
A proposed diagnosis for men who have anxiety about the size of their penis when they don’t have a clinically small penis.
Explanation of smoking fetish.
A definition of a social model of sexuality.
Sue Johanson is a registered nurse and a sex educator who had a popular television program in both Canada and the U.S. for many years.
A definition of the term swinging, as in the sexual activity.
The origins and meaning of the term teledildonic.
Why some people are putting an asterisk after the word Trans.
An example definition of the word transgender, a term people use to describe aspects of their gender identity.
A working definition of transphobia.
One definition of the word transsexual, a term people use to describe aspects of their gender identity.
Definition of the sexual activity tribadism.
Several different definitions and explanations of the term two-spirit in the context of a gender and sexual identity.
What does the term uncircumcised mean? Is it possible to undo a circumcision without surgery?
Describes the basics of vacuum pumps or vacuum erection devices, and the differences between these and penis pumps.
Who dilators are good for, what they are used for, and understanding the different types of dilators.
Definition and explanation of vaginal farts.
Definition of vaginoplasty, surgery that alters the internal and/or external female genitalia.
A definition of the term vanilla sex.
Definition of vasocongestion in the context of sexual arousal and sexual response.
What is a vibrator?
How has virginity been defined in the past, and how is it understood today?
There are many different definitions for virtual sex, here is a good place to start.
How human sexual response is traditionally understood by sex therapists and researchers.
When it comes to ejaculation, what is premature?
Explains the difference between sex and gender, and why that difference matters to everyone's life.
Readers share their ideas on how to define sex, what constitutes “real sex” and how they wish others would define sex.
Definition of the term Zoophilia.