The word sex itself is confusing. Even though its a small word, sex has a lot of meanings. In its most basic meaning, sex simply refers to the different bodies males and females have. There are lots of differences between male and female bodies. The most obvious is that males have a penis and a scrotum, and females have a vulva and a vagina. These body parts, or organs, are called sex organs. People have either male or female sex organs and belong to either the male or female sex. The word sex is also used in other ways. We may say that two people are having sex.

The word sex is also used in other ways. We may say that two people are having sex. This usually means they are having sexual intercourse. As we'll explain later in this chapter, sexual intercourse involves the joining together of two people's sex organs. Intercourse between male and a female is also how babies are made. We may say that two people are 'being sexual with each other'. This means they are having sexual intercourse or are holding, touching, or caressing each other's sex organs. We may say that we are feeling sexual. This means that we are having feelings or thoughts about being sexual with another person.

Our sex organs are private parts of our bodies. We usually keep them covered. We don't talk about them in public very often. Having sexual feelings and being sexual with someone aren't usually classroom ropics either. If I had half a brain in my head, I would have thought about all this before my first class. I would have realized that coming into a class room and talking about sex, penises, and vaginas was going to cause a big commotion. After that first class, I caught on real quick. I decided that, if we were going to get all silly and giggly, we might as well get really silly and giggly. Now I start my classes and workshops. I also give everyone red - and blue - coloured pencils.

The sex organs on the outside of the body in a grown man and a grown woman you can see in the image. These sex organs are also called the genital, or reproductive organs. We have sex organs on both the inside and outside of our bodies. They change as we go through puberty.