The naked truth behind gender in the modern world. In this timely 21st century reboot of the seminal bestseller 'Men are from Mars, Women are from Venus', Tom 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.