In a modern world of gender neutrality, equality and fluidity, Tom Whipple, science editor of the Times, explores the most surprising questions about the differences between the sexes unpacking the central psychology of our relationships.

Were we ever designed to be a monogamous species? Is it true that all women are bisexual? Is testosterone to blame for making men monsters?

This is a book about the place where biology meets behaviour - and where sexual differences in our bodies most closely translate into gender differences in the mind.

In this timely twenty-first century reboot of the seminal bestseller Men Are From Mars, Women Are from Venus, Whipple travels far and wide - from a gay penguin sanctuary in Germany to the headquarters of the world’s biggest online dating agency in New York - and draws on the latest studies in behavioural science as well as fascinating explorations into anthropology to produce a surprising tale of expectations and mismatches.

If you are currently single, this book is about your place in the dating market - your successes, your failures and what they mean. If you are married, it is about why you chose the person you are with, why they chose you - and the circumstances in which either of you might put it all at risk and stray. And if you are part of the LGBTQ+ community, this book might just give you an insight into the emerging science behind your sexuality.

Even if none of these apply to you, this book will show that love and sex are not quite as simple as a Mills and Boon novel. The truth, as Whipple demonstrates, is in the minor anomalies, rather than the accepted wisdoms and it is these which provide the most revealing windows into the deeper mysteries of human sexuality and gender.