Sex Why Life

Why Porn Stars Do Drugs

Johnny Quick

Why Women Have Sex

David M. Buss, Cindy M. Meston

Why Sex Matters : The Ultimate Guide to Understanding the Importance of Sex, Learn the Secrets of the Spiritual Satisfaction of Sex

S. T. Thompson

Why Men Fake It

Abraham Morgentaler

The Art of Sleeping Alone: Why One French Woman Suddenly Gave Up Sex

Sophie Fontanel

Vitamin O : Why Orgasms are Vital to a Woman's Health and Happiness, and How to Have Them Every Time!

Natasha Janina Valdez

Crazy Little Thing : Why Love and Sex Drive Us Mad

Liz Langley

101 sex life hacks and why you need them

Ida Rundberg

Becoming Cliterate : Why Orgasm Equality Matters--And How to Get It

Laurie Mintz

Strong Foundations : Why pelvic health matters – An empowering guide to understanding your body

Why is Sex Fun?

Jared Diamond