An orgasm is a sexual climax or peak. Orgasm occurs as a result of continued sexual stimulation. During an orgasm, there is a strong feeling of excitement and intense physical pleasure. Sexual stimulation may be sexual intercourse, rubbing and squeezing by hand (called masturbation), or other activities that excite the sex organs. During an orgasm, a person's body usually spasms (shakes or trembles) and the person's brain activity changes quickly. Orgasms may happen when people are asleep. When men ejaculate in their sleep, this is often called a "wet dream".
In a similar way, orgasms happen to other mammals when they engage in sexual activity.
Male orgasm[change | change source]
The penis usually becomes erect (hard) before an orgasm, and flaccid (soft) again after. When a man has an orgasm, he feels a very strong and enjoyable feeling in his penis and groin, and sometimes in all of his body. In a man, an orgasm usually happens at the same time as an ejaculation, which is a release of semen through the penis, that can't be stopped. Young boys can orgasm, but there may be no semen because semen release usually occurs only after puberty has started. After an orgasm, men usually have a deep sense of relaxation, usually felt in the groin and the thighs. Usually the stronger the orgasm, the deeper the relaxation and the longer the relaxation will last.
Female orgasm[change | change source]
A woman's orgasm begins in her clitoris, which is the counterpart of the man's penis. It is preceded by an erection of the clitoris and a moistening of the opening of the vagina. When a woman goes through a full orgasm, her uterus, vagina, anus and pelvic muscles undergo a series of rhythmic contractions. Most women find these contractions very pleasurable. Rubbing or applying other consistent pressure against the clitoris is usually needed to help the woman have an orgasm.
Orgasm and reproduction[change | change source]
Orgasm plays an important role in human reproduction. During sexual intercourse, a man places his penis inside a woman's vagina and moves it backwards and forwards. The woman may also move her hips back and forth, or in a circular motion. The friction caused by this movement, together with the warmth and pressure of the vagina, causes the man to have pleasurable feelings in the penis, which grow stronger and stronger until the man has an orgasm, at which time semen then shoots out from the end of the penis into the woman's vagina. The semen can make the woman pregnant. The woman may also have an orgasm during intercourse as well. Scientists are not sure why women have orgasms. Some believe that the orgasm helps the sperm in the man's semen to swim up the vagina into the cervix, so that it is more likely that a sperm cell will fuse with an egg cell. Others think that the woman's orgasm is designed to help make the man reach orgasm. During her orgasm, a woman may moan, cry, or scream, which usually excites her man, and her vagina may grip the penis more tightly, which also makes sex more exciting for him. These reactions may cause the man to ejaculate more quickly or to produce more semen. Orgasm may also encourages a woman to have sex more often as it feels good, increasing the chances of pregnancy.
References[change | change source]
- van Netten JJ, Georgiadis JR, Nieuwenburg A, Kortekaas R (April 2008). "8-13 Hz fluctuations in rectal pressure are an objective marker of clitorally-induced orgasm in women". Archives of Sexual Behavior 37 (2): 279–85. doi:10.1007/s10508-006-9112-9. PMID 17186125.
- "'I Want a Better Orgasm!'". WebMD. http://web.archive.org/web/20090113132443/http://www.webmd.com/sex/want-better-orgasms. Retrieved November 14, 2012.
- Wayne Weiten, Dana S. Dunn, Elizabeth Yost Hammer (2011). Psychology Applied to Modern Life: Adjustment in the 21st Century. Cengage Learning. p. 386. ISBN 1-111-18663-4, 9781111186630. http://books.google.com/books?id=CGu96TeAZo0C&pg=PT423&dq=&hl=en&sa=X&ei=MwIGT-jxEojU2AWzv5ylCg&ved=0CDwQ6AEwAA#v=onepage&q=false. Retrieved November 14, 2012.
- Mah, Kenneth; Binik, Yitzchak M (2001, available online on 17 July 2001). "The nature of human orgasm: a critical review of major trends". Clinical Psychology Review 21 (6): 823–856. doi:10.1016/S0272-7358(00)00069-6. PMID 11497209. http://www.sciencedirect.com/science/article/pii/S0272735800000696. "Women rated clitoral stimulation as at least somewhat more important than vaginal stimulation in achieving orgasm; only about 20% indicated that they did not require additional clitoral stimulation during intercourse.".
- Kammerer-Doak, Dorothy; Rogers, Rebecca G. (2008, available online on 16 May 2008). "Female Sexual Function and Dysfunction". Obstetrics and Gynecology Clinics of North America 35 (2): 169–183. doi:10.1016/j.ogc.2008.03.006. PMID 18486835. http://www.sciencedirect.com/science/article/pii/S0889854508000235. "Most women report the inability to achieve orgasm with vaginal intercourse and require direct clitoral stimulation ... About 20% have coital climaxes...".
- R.R. Baker; M.A. Bellis (1993). "Human Sperm Competition: Ejaculation Manipulation by Females and a Function for the Female Orgasm". Animal Behavior 46: 887–909.