Sexual arousal

An erection (clinically: penile erection or penile tumescence) is a physiological phenomenon in which the penis becomes firm, engorged, and enlarged. Penile erection is the result of a complex interaction of psychological, neural, vascular, and endocrine factors, and is often associated with sexual arousal, sexual attraction or libido, although erections can also be spontaneous. The shape, angle, and direction of an erection vary considerably between humans.

In male human anatomy, the foreskin, also known as the prepuce (), is the double-layered fold of skin, mucosal and muscular tissue at the distal end of the human penis that covers the glans and the urinary meatus. The foreskin is attached to the glans by an elastic band of tissue, known as the frenulum. The outer skin of the foreskin meets with the inner preputial mucosa at the area of the mucocutaneous junction. The foreskin is mobile, fairly stretchable and sustains the glans in a moist environment. Except for humans, a similar structure known as a penile sheath appears in the male sexual or

arousal of sexual desire, during or in anticipation of sexual activity

The G-spot, also called the Gräfenberg spot (after German gynecologist Ernst Gräfenberg), is characterized as an erogenous area of the vagina that, when stimulated, may lead to strong sexual arousal, powerful orgasms and potentially female ejaculation. It is typically reported to be located up the anterior vaginal wall (towards the urinary system), and is a sensitive area that may be part of the female prostate.

area of heightened sensitivity of the body, touching which may elicit a sexual response

Hypersexuality is a proposed medical condition said to cause unwanted or excessive sexual arousal, causing people to engage in or think about sexual activity to a point of distress or impairment. Whether it should be a clinical diagnosis used by mental healthcare professionals is controversial. The terms nymphomania and satyriasis have historically been used to describe this condition in women and men, respectively.

difficulty experienced by humans during any stage of normal sexual activity

naturally produced fluid that lubricates a vagina

four-stage model of physiological responses to sexual stimulation

physiological phenomenon where the clitoris becomes enlarged and firm, as result of a complex interaction of psychological, neural, vascular and endocrine factors, usually (though not exclusively) associated with sexual arousal

unwanted, unprompted, persistent arousal of the female genitalia, without desire

persistent or recurrent inability to attain sexual arousal or to maintain arousal until the completion of a sexual activity

spontaneous swelling of the clitoris during sleep or when waking up

transient reddening of the face as symptom

activities meant to impart physical sensations

Tumescence is the quality or state of being tumescent or swollen. Tumescence usually refers to the normal engorgement with blood (vascular congestion) of the erectile tissues, marking sexual excitation, and possible readiness for sexual activity. The tumescent sexual organ in males is the penis and in females is the clitoris and other parts of the genitalia like the vestibular bulbs. Arteries in the penis dilate to increase blood volume.

produced by females for mating

physiological response that varies the size of the pupil