Sexual arousal also sexual excitement is typically the arousal of sexual desire during or in anticipation of sexual activity. A number of physiological responses occur in the body and mind as preparation for sexual intercourse and continue during it. Male arousal will lead to an erection , and in female arousal the body's response is engorged sexual tissues such as nipples , vulva , clitoris , vaginal walls , and vaginal lubrication. Mental stimuli and physical stimuli such as touch, and the internal fluctuation of hormones , can influence sexual arousal.
Cindy Meston, Ph. Over the past two decades, research has demonstrated a strong link between acute exercise and physiological i. In this chapter we provide a summary of the laboratory studies that have examined the effects of acute exercise on sexual arousal in women, and provide a potential explanation for the mechanisms of action underlying this relationship. Physiological sexual arousal results from genital vasocongestion, which occurs with increased blood flow to the genitals. When blood begins to pool in the vaginal walls, the increase in blood volume leads to increased pressure inside the capillaries, which subsequently triggers lubricated plasma to transcend the vaginal epithelium onto the surface of the vagina Levin, These platelets form droplets, creating the lubricative film that typically covers the vaginal walls during sexual activity. Increased blood flow also leads the clitoris and the vestibular bulbs to protrude and become engorged Berman, , and well-oxygenated blood is also supplied to the skin and the breasts Levin, In addition to increased blood flow, sexual arousal causes relaxation of the smooth muscles in the vaginal wall, which allows the vagina to lengthen and dilate.
Stage 2: sexual plateau
In men and women sexual arousal culminates in orgasm, with female orgasm solely from sexual intercourse often regarded as a unique feature of human sexuality. However, orgasm from sexual intercourse occurs more reliably in men than in women likely reflecting the different types of physical stimulation men and women require for orgasm. In men, orgasms are under strong selective pressure as orgasms are coupled with ejaculation and thus contribute to male reproductive success. By contrast, women's orgasms in intercourse are highly variable and are under little selective pressure as they are not a reproductive necessity.. The proximal mechanisms producing variability in women's orgasms are little understood.