What is the definition of adultery?
Definition of acrotomophilia, which describes being sexually aroused or having sexual fantasies about having sex with someone who has an amputated limb.
An explanation of how the word abstinence is used, and what it refers to.
Definition of agoraphilia which describes sexual excitement from being outdoors and/or enjoying sex in public places.
Defining agalmatophilia, a fetish that involves arousal or sexual excitement for statues for mannequins.
Definition of the word analingus, also called rimming.
Definition of anorgasmia, an inability to reach orgasm or climax.
Definition of asphyxiophilia, the practice of depriving oneself of oxygen to create sexual arousal or enhance sex.
Androgynous has more than one definition, and here are a few common ways that it is defined.
Scientific and cultural definitions of asexual.
A description and definition of autofellatio, the act of performing oral sex on oneself.
A definition for the term BDSM which is an umbrella term to describe a wide range of sexual activities, and emotional and spiritual interactions.
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.
Chlamydia symptoms and links to more resources on Chlamydia and other sexually transmitted diseases.
A definition of the word coitus.
Butt Plug Harness
What is a butt plug harness?
About Coccinelle, well known female performer who was also the first person to have sex reassignment surgery in France.
Definition and description of butt plugs.
An explanation of Climacturia, a medical term describing orgasm-associated incontinence.
A definition of the term cuckold.
Definition of the fetish or paraphilia known as coprophilia.
An explanation of the term cuddle party, with links to more information on cuddle parties.
A definition of the term cisgender, with links to further readings.
Explains what a dental dam is in the context of using dental dams for safer sex.
Dr. Vern Bullough 1928-2006
About sex reseacher and historian Vern Bullough 1928-2006
Definition of the sex toy called a "dildo."
Dr. Geri Weitzman
Brief biography for Dr. Geri Weitzman.
Dr. John Money 1921-2006
Information about pioneering sex researcher Dr. John Money.
DSM (Diagnostic and Statistical Manual of Mental Disorders)
Explains the Diagnostic and Statistical Manual of Mental Disorders (DSM).
Definition of the term erectile dysfunction.
Dual Action Vibrator
Definition of dual action vibrator
Definition of Dysparuenia or painful intercourse.
Definition of the term emergent sex, coined by Brenda Brathwaite.
Erotophilia and Erotophobia
Definition of the personality dimension called erotophilia and erotophobia.
Female Genital Cosmetic Surgery (FGCS)
Definition of the various kinds of female genital cosmetic surgeries, including vagioplasty and labiaplasty.
Female Orgasmic Disorder
A definition of female orgasmic disorder.
Clinical and non-clinical definitions of fetish.
Definition of erogenous zones, and a list of some of the common erogenous zones.
Definition of Frenulum Breve a condition that can make sexual activity painful.
Genital herpes symptoms and links to more resources on genital herpes and other sexually transmitted diseases.
Definition of the sexual activity frottage.
What is fetish sex, and can it be part of a healthy sex life?
Explanation of foot fetish and the various forms it takes.
Hypoactive Sexual Desire Disorder (HSDD)
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.
A definition of the word intercourse in a sexual context.
Definition of Kegel exercises, used to strengthen the pelvic floor muscles.
A definition of gender in the context of sexuality and sexual health.
Definition of paraphilia.
Definition of klismaphilia, or deriving sexual arousal and pleasure from enemas.
A working definition of homophobia in the context of sexual health.
Definition of labiaplasty, surgery to alter the size of the labia.
Definition of the rare disorder lichen sclerosus
Male Orgasmic Disorder
A definition of male orgasmic disorder.
Gender Non-Conforming Children
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.
Medical Model of Sexuality
A definition of the term medical model as it applies to an understanding of sexuality.
What does the term gender variant mean?
What genderqueer means, and who the term applies to.
An explanation of the Kinsey Scale proposed by sex researcher Alfred Kinsey.
Non Ejaculatory Orgasm
Definition of non-ejaculatory orgasm, a term generally used when refering to male orgasm and the experience of male multiple orgasm.
Infidelity, Adultery, and Cheating
Comparing different definitions of sexual betrayal.
Oral Sex Taste
What makes up the taste of oral sex? An explanation of what oral sex taste is comprised of.
Provides a definition of the term refractory period.
How Is Sex Determined?
Describes the definition of physical, biological, or genetic sex, as determined by anatomy and chromosomes.
Definition of the term Pansexual.
What defines kinky sex?
Explains what the perineum is and where to find it.
Definition of premature ejaculation
Describes the basics of penis pumps and the difference between penis pumps and vacuum pumps or vacuum erection devices.
Persistent Genital Arousal Disorder (PGAD)
Definition of persistent genital arousal disorder (PGAD), also known as persistent sexual arousal syndrome (PSAS).
A definition and description of play piercing.
Persistent Sexual Arousal Syndrome (PSAS)
Definition of persistent sexual arousal syndrome (PSAS), also known as persistent genital arousal disorder (PGAD).
Explanation of medical fetish.
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.
Definition of the condition priapism.
Pubococcygeus (PC) Muscles
Definition of the Pubococcygeus Muscles, known as the PC muscles.
Romantic Product Salesman
Describes the little known profession of romantic product salesmen.
Definition of the term Rainbow Parties.
What is semen, and what is it made of?
A definition of monogamy.
Defines the term sex drive, also known as sexual instinct or libido.
What is involved in penile rehabilitation?
What is the definition of a sex toy? How are sex toys defined in law, by public health, and by commerce?
How does sexual identity differ from sexual orientation, or sexual behavior? Here’s a working definition of sexual identity.
Explanations of the various definitions of orgasm.
Historically, researchers have conceptualized sexual orientation in a variety of different ways. Here is a practical definition of sexual orientation.
Explains how sex work is commonly defined, and what the difference is between the term sex work and the term prostitution.
A definition of sexual pleasure.
Sexual Problems (reader definitions)
Readers share definitions of what makes something a sexual problem.
A definition of the term swinging, as in the sexual activity.
What is the definition of a sexual dysfunction?
What does the term uncircumcised mean? Is it possible to undo a circumcision without surgery?
What is sexual surrogacy and who are sexual surrogates?
Definition of vaginoplasty, surgery that alters the internal and/or external female genitalia.
Definition of the term ableism.
Definition of incontinence.
Definition of vasocongestion in the context of sexual arousal and sexual response.
Your Sexual Definitions
Readers share their ideas on how to define sex, what constitutes “real sex” and how they wish others would define sex.
National Survey of Family Growth
Learn more about the largest ongoing collection of data in the U.S. related to families and sexual health.
A definition of the term foreplay.
The origins and meaning of the term teledildonic.
Definition of the term Zoophilia.
Social Model of Sexuality
A definition of a social model of sexuality.
Describes the basics of vacuum pumps or vacuum erection devices, and the differences between these and penis pumps.
There are many different definitions for virtual sex, here is a good place to start.
Brief historical and contemporary definitions of the word queer, in reference to sexuality and gender.
Explanation of smoking fetish.
Sexual Performance Anxiety
Definition of the term sexual performance anxiety.
Definition of the sexual activity tribadism.
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 sexual desire.
A definition of sexual arousal.
A definition and explanation of the idea of compulsory monogamy.
Definition of infidelity in the context of a sexual or romantic relationship.
A definition of the term vanilla sex.
What defines a sexual hangup?
An example definition of the word transgender, a term people use to describe aspects of their gender identity.
One definition of the word transsexual, a term people use to describe aspects of their gender identity.
Explains what is included in a definition of sexual expression.
A working definition of transphobia.
Several different definitions and explanations of the term two-spirit in the context of a gender and sexual identity.
Definition of Sex
Find out how sex and sexuality are defined differently and how those difference impact your experience of sex.
How do you define cheating in a romantic, committed relationship?
How has virginity been defined in the past, and how is it understood today?
Who dilators are good for, what they are used for, and understanding the different types of dilators.
What Is the Difference Between Sex and Gender?
Explains the difference between sex and gender, and why that difference matters to everyone's life.
A definition and explanation of common mistakes when using the term gender neutral.
What's the difference between an open relationship and cheating?
How old do you have to be to qualify as an adult virgin?