Anatomy & development

At puberty girls develop a child-bearing capacity

From a young age, most girls demonstrate a more passive and timid personality than most boys. Girls often focus on social activities rather than...

Men tend to focus on opportunities for intercourse

Sex may not be the only reason men seek relationships with women, but it is the key reason. Men’s sex drive focuses them on...

Young men tend to focus on enjoying their arousal

Men are valued for their physical strength, their practical skills and their personal confidence (leaderships skills). Young men increase their muscle mass at puberty...

At puberty boys develop a reliable arousal cycle

From a young age, many boys already demonstrate a more active and outgoing personality than most girls. Boys enjoy physical activities such as sport...

The internal anatomy involved in reproduction

Our sex is determined by chromosomes. A man has an XY chromosome and a woman has an XX chromosome. There are other combinations (involving...

The female erectile sex organ (or phallus)

In the absence of testosterone, the genital tubercle forms the female phallus, called the clitoris. The clitoris consists of the glans and the internal...

The male erectile sex organ (or phallus)

A man’s sex organ (penis) is separate from his internal reproductive anatomy (testes and glands) but also integral. The penis has three main functions. Firstly...