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If the reproductive act is complete, sperm cells are passed from the male body into the female, in the process fertilizing the female egg and forming a new organism.

In some vertebrates, such as fish, eggs are laid outside of the body and fertilized externally.

In the human male, the penis serves both excretory and reproductive functions.

Learning how to protect yourself from unwanted pregnancy and sexually transmitted infections (STIs) including HIV, will also help you become more confident when the time is right to have sex.

Sexual intercourse, also called Coitus, or Copulation, reproductive act in which the male reproductive organ (in humans and other higher animals) enters the female reproductive tract.

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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  2. Aug 19, 2013. Not all men want sex all the time. Men often get a bum rap, depicted as constantly sexually motivated, as if they live in a mental squirrel cage with a constant agenda to get into their spouse's. So they keep pursuing sex, to get these gems -- thinking that the excitement of intercourse provides Nirvana.

  3. Sexual intercourse, also called Coitus, or Copulation, reproductive act in which the male reproductive organ in humans and other higher animals enters the female reproductive tract. If the reproductive act is complete, sperm cells are passed from the male body into the female, in the process fertilizing the female egg and.

  4. Effects on the probability of conception, survival of the pregnancy, and sex of the baby. BACKGROUND The timing of sexual intercourse in relation to ovulation strongly influences the chance of conception, although the actual number of fertile days in a woman's menstrual cycle. Two thirds n = 129 ended in live births.

  5. Oct 19, 2017. This will depend on what country you live in as laws are different around the world. The most common age of sexual consent is 16.1. The legal age for sex in your country may be different depending on whether you are a boy or a girl. It could also vary if you are gay or lesbian - in many countries gay and.

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