What Are Normal Sexual Averages?

A man's average height is 5 feet and 9 inches; average weight is 172 pounds. Average penis sizes range from 3 to 5 inches when not erect to 5 to 7 inches when erect. Men's testicles, on average, are approximately 2 inches long, with a diameter of 1.2 inches. The average man's semen has an alkaline pH of 7.0 to 8.0, and semen ejaculated contains about 300 to 500 million sperm.

Women are 5-feet, 3.5-inches tall and 143 pounds on average. A woman's vagina expands to approximately 4 inches long when stimulated, and rests at 3 inches long. Women's ovaries are usually 1.5 inches long and .075 inches wide; breasts measure in at 35.9 inches. Women release approximately 400,000 eggs throughout their lifetime, and the vagina's pH level is 4.0 to 5.0.

Thirty-four percent of married couples have sex two to three times a week on average. Seven percent of married couples are little more ambitious and have weekly sex five or more times. A whopping 95 percent of married couples were sexually active prior to tying the knot, yet 50 percent of married couples who lived together prior to marriage end up divorced.

How have these averages changed over the last 50 years? Our height hasn't really changed that much, but we've gained a lot of weight. The average woman's bust size has increased slightly, but data does not suggest any other pertinent physical changes. We are a society that is more open about sex now, so people might be enjoying sex a little more often.

Sexual Averages and Behavior of Men, Women, and Couples

• Frequently Asked Sexuality Questions to The Kinsey Institute - The Kinsey Institute famously began documenting human sexual behavior over 50 years ago. Here are the results of its research.
• Sexual Behavior, Sexual Attraction, and Sexual Identity in the United States - How do we behave sexually, and what attracts us to our mates? The CDC reports this here.
• Sexual Behavior Later in Life - Read how sexual behavior changes as we age at this link.
• Biological Basis of Sex Appeal - There is a biological basis to sex appeal, and this link explains what that is in detail.
• The Human Sexual Response – Similarities and Differences in the Anatomy and Function of the Male and Female Genitalia: Are They a Trivial Pursuit or a Treasure Trove? - Genders really aren't that different, even though we might look like it. Find out why at this link.
• Sperm Competition in Humans: Implications for Male Sexual Psychology, Physiology, Anatomy, and Behavior - Studies confirm that male sexuality is directly related to his ability to spread his seed at this link.

Male and Female Reproductive Anatomy

• Reproductive Anatomy of the Human Male - This links provides a comprehensive breakdown of the human male reproductive system.
• The History of Male and Female Genitalia - Find out more about the history of both the male and female genitalia at this link.
• Human Reproduction: Anatomy and Physiology - How do we reproduce? This link explains both the male and female reproductive systems.
• Human Anatomy: The Reproductive System - This link also provides a breakdown of the male and female sexual anatomy and the roles they play in reproduction.
• The Male and Female Reproductive System - Continue your education on the human reproductive systems by clicking on this link.
• Reproductive System: Anatomy of Male and Female Reproductive Systems - This link also provides detailed information about human sexual anatomy and its role in reproducing our species.
• Human Reproduction - This link also discusses human reproduction and how our sexual anatomy allows us to have children.