koty: Vagina

Evidence: 100 • authority: 72

The vagina (pl.: vaginas or vaginae) is the elastic, muscular reproductive organ of the female genital tract through which mammals copulate and give birth. In humans, it extends from the vulval vestibule to the cervix (neck of the uterus). The vaginal introitus is normally partly covered by a thin layer of mucosal tissue called the hymen. The vagina also channels menstrual flow, which occurs in humans and closely related primates as part of the menstrual cycle. During sexual intercourse, the vaginal walls produce vaginal lubrication and create friction which stimulates the penis toward ejaculation, enabling fertilization. Along with pleasure and bonding, sexual activity can cause sexually t…

Evidence: 52 • authority: 80

Can internet-based sexual health services increase diagnoses of sexually transmitted infections (STIs)? Evaluation of an internet-based sexual health service

Evidence: 52 • authority: 72

Masturbation is a form of autoeroticism in which a person sexually stimulates their own genitals for sexual arousal or other sexual pleasure, usually to the point of orgasm. In humans, this typically involves orgasm in both sexes and, in males, is often accompanied by ejaculation. Stimulation may involve the use of hands, everyday objects, sex toys, or more rarely, the mouth (autofellatio and autocunnilingus). Masturbation may also be performed with a sex partner, either masturbating together or watching the other partner masturbate, known as "mutual masturbation". Masturbation is frequent in both sexes. Various medical and psychological benefits have been attributed to a healthy attitude t…

Evidence: 45 • authority: 72

A condom is a sheath-shaped barrier device used during sexual intercourse to reduce the probability of pregnancy or a sexually transmitted infection (STI). There are both external condoms, also called male condoms, and internal (female) condoms. The external condom is rolled onto an erect penis before intercourse and works by forming a physical barrier which limits skin-to-skin contact, exposure to fluids, and blocks semen from entering the body of a sexual partner. External condoms are typically made from latex and, less commonly, from polyurethane, polyisoprene, or lamb intestine. External condoms have the advantages of ease of use, ease of access, and few side effects. Individuals with l…

Evidence: 45 • authority: 92

Screening a library of antibacterial compounds leads to discovery of novel inhibitors for Neisseria gonorrhoeae and Chlamydia trachomatis.. Chlamydia trachomatis and Neisseria gonorrhoeae were the most common bacteria causing sexually transmitted infections (STIs) in 2020, with 211 million cases worldwide. Despite the fact that the co-infections of N. gonorrhoeae with C. trachomatis are common, there is no single treatment effective against both pathogens. Ceftriaxone, the current recommended drug for gonococcal infections, is not effective against C. trachomatis. Additionally, N. gonorrhoeae has developed resistance against the drugs recommended for treating chlamydial infections. Therefor…

Evidence: 38 • authority: 72

Bisexuality is defined as having romantic attraction, sexual attraction, or sexual behavior towards more than one gender or attraction that is not limited by sex or gender. The term bisexuality originated in early sexology as a descriptor for those with both homosexual and heterosexual attraction and was coined in the 19th century in German by Richard von Krafft-Ebing in his Psychopathia Sexualis, then introduced to English by Charles Gilbert Chaddock in his 1892 translation. Bisexual (or bi) was reclaimed as a sexual orientation label in the 1960s and has been defined in a variety of ways by the bisexual community, including as attraction regardless of gender or sex, attraction existing be…

Evidence: — • authority: 72

Non-penetrative sex or outercourse is sexual activity that usually does not include sexual penetration, but some forms, particularly when termed outercourse, include penetrative aspects, that may result from forms of fingering or oral sex. It generally excludes the penetrative aspects of vaginal, anal, or oral sex, but includes various forms of sexual and non-sexual activity, such as frottage, manual sex, mutual masturbation, kissing, or hugging. People engage in non-penetrative sex for a variety of reasons, including as a form of foreplay or as a primary or preferred sexual act. Heterosexual couples may engage in non-penetrative sex as an alternative to penile-vaginal penetration, to prese…

Evidence: — • authority: 72

Cunnilingus is an oral sex act consisting of the stimulation of a vulva by using the tongue and lips. The clitoris is the most sexually sensitive part of the vulva, and its stimulation may result in a woman becoming sexually aroused or achieving orgasm. Cunnilingus can be sexually arousing for participants and may be performed by a sexual partner as foreplay to incite sexual arousal before other sexual activities (such as vaginal or anal intercourse) or as an erotic and physically intimate act on its own. Cunnilingus can be a risk for contracting sexually transmitted infections (STIs), but the transmission risk from oral sex, especially of HIV, is significantly lower than for vaginal or ana…

Evidence: — • authority: 72

Sex, more formally known as sexual intercourse, coitus, or copulation, is an intimate social activity typically involving the insertion of the erect male penis inside the female vagina and followed by thrusting motions for erotic pleasure, biological reproduction, or both. This specific type of sex is also known as vaginal intercourse (or vaginal sex). However, other forms of penetrative sexual intercourse are also possible, including anal sex (penetration of the anus by the penis), oral sex (penetration of the mouth by the penis or oral contact with or penetration of the female genitalia), fingering (sexual penetration by the fingers) and penetration by use of a dildo (especially a strap-o…

Evidence: — • authority: 72

A urinary tract infection (UTI) is an infection that affects a part of the urinary tract, which includes the bladder, urethra and the kidney. Lower UTIs affect the bladder (cystitis) or urethra while upper UTIs affect the kidney (pyelonephritis). Symptoms from a lower UTI include burning or pain during urination, pain in the lower abdomen and the urge to urinate even when the bladder is empty. Symptoms of a kidney infection are more systemic and include fever or flank pain, usually in addition to the symptoms of a lower UTI. Rarely, the urine may appear bloody. Symptoms may be less clear in very young or old people. The most common cause of infection is E. coli, though other bacteria or fun…

Evidence: — • authority: 72

In amniotes, the clitoris ( KLIT-ər-iss or klih-TOR-iss; pl.: clitorises or clitorides) is a female sex organ. In humans, it is the vulva's most erogenous area and generally the primary anatomical source of female sexual pleasure. The clitoris is a complex structure, and its size and sensitivity can vary. The visible portion, the glans, of the clitoris is typically roughly the size and shape of a pea and is estimated to have more than 10,000 nerve endings. Sometimes in common speech, clitoris or clit is used to solely reference the glans. Sexological, medical, and psychological debate has focused on the clitoris, and it has been subject to social constructionist analyses and studies. Such d…