Sexual intercourse penetration

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Coitus is derived from the Latin word coitio or coire, meaning "a coming together or joining together" or "to go together", and is known under different ancient Latin names for a variety of sexual activities, but usually denotes penile—vaginal penetration. Lerner and Laurence Steinberg state that researchers also "rarely disclose" how they conceptualize sex "or even whether they resolved potential discrepancies" in conceptualizations of sex. While most consider penile—vaginal intercourse to be sex, whether or not anal or oral intercourse is considered sex is more debatable, with oral sex ranking lowest. Human mating strategies and Pair bond Copulation ranges from a purely reproductive activity to one of emotional bonding.
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What Is Vaginismus?

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Describes someone who does not engage in sexual activity, usually by choice. Diaphragms, cervical caps and contraceptive sponges are kinds of cervical barriers. This is often used by people who are trying to get pregnant but is NOT an effective birth control method, as it fails frequently due to fluctuations in a woman's cycle and the fact that sperm can live in a woman's reproductive tract for several days. Also called " fertility awareness ". It can also infect the throat when acquired through oral sex. Chlamydia requires medical treatment. For example, someone who was sexed male at birth and whose gender identity is masculine ; who also feels male.
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For some women, the vaginal muscles involuntarily or persistently contract when they attempt vaginal penetration. This is called vaginismus. The contractions can prevent sexual intercourse or make it very painful. A gentle pelvic exam typically shows no cause of the contractions. No physical abnormalities contribute to the condition.
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Mating can occur only with entwined tails, thus placing the male and female vents together for insertion of the penis. Courtship patterns range from a seemingly abusive interaction to a titillation routine that entices… To accomplish internal copulation certain body and organic adaptations are necessary. In the human male, the penis serves both excretory and reproductive functions. During intercourse, the blood flow is temporarily increased and trapped in the penis so that it becomes enlarged and elevated, a condition known as erection. Erection changes the normally soft and flaccid organ to one of greater size and rigidity to permit easier penetration into the reproductive tract of the female.
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