Sex is an important part of being human. It involves more than the physical act of intercourse with another person. It affects how we feel about ourselves as males and females, and even impacts some of the choices we make. That is why it is a good idea to talk to your kids about sex. They are going to learn about it somewhere, so it is best that they learn it from their parents. The best time to begin having these discussions is when your children are in the preteen/middle school years.

Why Should I Talk to My Kids About Sex?
Talking with your child about sex is important to help him or her develop healthy attitudes toward sex and to learn responsible sexual behavior. Openly discussing sex with your child also enables you to provide accurate information. What they learn elsewhere might not be true, and might not reflect the personal and moral values and principles you want your children to follow. In addition, they need to understand the possible consequences of being sexually active -- including pregnancy and sexually transmitted diseases, as well as being emotionally hurt.

If I Talk to My Kids About Sex, Won't That Just Make Them Want to Do It?
It is important for children to understand sexual feelings and relationships before they become sexually active. In fact, studies have shown that teens who have discussed sex with their parents are more likely to wait longer to begin having sex and to use contraception.

What Should I Tell My Kids About Sex?
First of all, focus on the facts about sex. Consider using the following list of topics as an outline:

Explanation of anatomy and reproduction in males and females
Sexual intercourse and pregnancy
Fertility and birth control
Other forms of sexual behavior, including oral sex, masturbation, and petting
Sexual orientation, including heterosexuality, homosexuality, and bisexuality
The physical and emotional aspects of sex, including the differences between males and females
Self-image and peer pressure
Sexually transmitted diseases
Rape and date rape, including how being intoxicated (drunk or high), or accepting rides/going to private places with strangers or acquaintances puts you at risk
How choice of clothing and the way you present yourself sends messages to others about your interest in sexual behavior
How Should I Talk to My Kids About Sex?
Some parents are uncomfortable talking to their kids about sex. It may help to practice what you are going to say before you sit down with your son or daughter. Be sure to pay attention and listen, as well. It may be helpful to have both parents present for support. Some kids may be embarrassed to talk about sex or to admit they don't know something, and so may not ask direct questions. Look for opportunities to bring up sexuality issues with your children. Opportunities may come from a scene on TV or in a movie, a book or article, or the appearance of visible changes in your son or daughter, such as the growth of breasts or facial hair. Explain the physical maturation process and the sexual arousal process. Remember to respect your child's privacy, and try to show that you trust him or her to make good decisions.

Teen Sexual Rights
When talking with your teen, consider the following teen sexual rights, which were developed by the Sexuality Information and Education Council of the United States (SIECUS):

The right to accurate information about sexuality and HIV/AIDS
The right to stop being physical or sexual with a partner at any point
The right to say no to an unwanted touch of any kind
The right to make decisions about sexuality, in your own time
The right to express your sexuality safely, without risk of pregnancy, or STDs including HIV/AIDS
The right not to be pressured into being physical or sexual
The right not to express your sexuality unless you want to
Reviewed by the doctors at The Cleveland Clinic Department of Psychiatry and Psychology
(source:.webmd.com)