Des p'tites informations apropos :)
Cest peut-etre un article con pour certains, mais pour beaucoup, ca peut aider.
Entouka moi jai appris des tite choses hehe!
Cest toujours bon de savoir ske ca fait, et ske cest!
Sex as exercise burns calories to produce health benefits. Sex relieves stress, boosts the immune system with higher levels of immunoglobulin A, improves cardiovascular health, increases self-esteem, improves intimacy, reduces pain by production of the hormone oxytocin, reduces the risk of prostate cancer, strengthens pelvic muscles, and promotes good sleep. In addition, sex improves the sense of smell and urinary bladder control
Thirty minutes of sex burns 85 calories or more. While not seemingly a significant amount, 42 half-hour sessions will burn 3,570 calories, which is sufficient enough to lose a pound. A person can drop the pound in 21 hour-long sessions.
Sexual intimacy, as well as orgasms, increases levels of the hormone oxytocin, also known as "the love hormone" which helps people bond and build trust.
Men who have frequent ejaculations, especially men in their 20s, may reduce their risks of prostate cancer later in life.
During sex, pelvic floor muscle exercises known as Kegels offer benefits for women. More sexual pleasure is expected to result, strengthening of the area, and help to minimize the risk of incontinence later in life.
According to the Kinsey Institute, average frequency of sexual intercourse in USA is 112 times per year (age 18-29), 86 times per year (age 30-39), and 69 times per year (age 40-49)
The sex flush tends to occur more often under warmer conditions and may not appear at all under cooler temperatures.[6] It has also been commonly observed that the marked degree of the sex flush can predict the intensity of orgasm to follow.[7]
During the female sex flush, pinkish spots develop under the breasts, then spread to the breasts, torso, face, hands, soles of the feet, and possibly over the entire body. Vasocongestion is also responsible for the darkening of the clitoris and the walls of the vagina during sexual arousal. During the male sex flush, the coloration of the skin develops less consistently than in the female, but typically starts with the epigastrium (upper abdomen), spreads across the chest, then continues to the neck, face, forehead, back, and sometimes, shoulders and forearms.
The sex flush typically disappears soon after orgasm occurs, but this may take up to two hours or so, and sometimes, intense sweating will occur simultaneously. The flush usually diminishes in reverse of which it appeared.
An increase in muscle tone (myotonia) of certain muscle groups, occurring voluntarily and involuntarily, begins during this phase among both sexes. Also, the external anal sphincter may contract randomly upon contact (or later during orgasm without contact).
Excitement in males
In males, the beginning of the excitement phase is observed when the penis becomes partially erect, often after only a few seconds of erotic stimulation. The erection may be partially lost and regained repeatedly during an extended excitement phase. Both testicles become drawn upward toward the perineum, notably in circumcised males where less skin is available to accommodate the erection. Also, the scrotum can tense and thicken during the erection process.
Excitement in females
In females, venous patterns across the breasts become more visible and the breasts very slightly increase in size, which becomes more observable if lying on the back. The labia majora become flatter, thinner, and rise upwards and outwards in nulliparous women (those who have not given birth).[8] In parous women (those who have given birth), they may increase two or threefold in size.[citation needed] The labia minora may increase in size and may protrude from the labia majora, depending on the size they are in a normal, relaxed state. The clitoral glans becomes tumescent, or swollen, like the glans of the penis. Following stimulation, vaginal lubrication is produced by the vasocongestion of the vaginal walls. They darken in color and become smoother than normal. Also, the uterus elevates, more vertically as time passes, and the inner two-thirds of the vagina expand, usually a total of 7 to 10 cm.
Orgasm is the conclusion of the plateau phase of the sexual response cycle, and is experienced by both males and females. It is accompanied by quick cycles of muscle contraction in the lower pelvic muscles, which surround both the anus and the primary sexual organs. Women also experience uterine and vaginal contractions. Orgasms are often associated with other involuntary actions, including vocalizations and muscular spasms in other areas of the body, and a generally euphoric sensation. Heart rate is increased even further.
In men, orgasm is usually associated with ejaculation. Each spurt is associated with a wave of sexual pleasure, especially in the penis and loins. Other sensations may be felt strongly among the lower spine, or lower back. The first and second convulsions are usually the most intense in sensation, and produce the greatest quantity of semen. Thereafter, each contraction is associated with a diminishing volume of semen and a milder wave of pleasure.
Orgasms in females may also play a significant role in fertilization. The muscular spasms are theorized to aid in the locomotion of sperm up the vaginal walls into the uterus.
According to a Kinsey study, just under half of men reported a time to ejaculation from intromission of five minutes or less.[citation needed] About a fifth claimed that coitus lasted 10 minutes or longer. Others may have taken over one hour. Taking too long, however, can turn pleasure into pain.
A survey of Canadian and American sex therapists said that the average time for intromission was 7 minutes and that 1 to 2 minutes was too short, 3 to 7 minutes was adequate and 7 to 13 minutes desirable, while 10 to 30 minutes was too long.