Questions of sexuality and gender are in the forefront of public discourse. Every day there are stories in the newspaper about such issues as same-sex marriage, and gay and lesbian parenting. This fascinating book explores the myriad influences that shape human gender and sexuality. Drawing on the scientific findings of experts and on a wide range of personal experiences from everyday people, Johnson explores questions such as: Is sexual diversity new? Why do men and women think differently? Apart from their sexuality, are homosexuals and heterosexuals different? Why do some people feel compelled to change their gender? How do genes, hormones and society affect our sexuality? Answering these and related questions in a rational and entertaining way, Johnson provides a wealth of information about our own sexuality and asserts that only familiarity with the concept of sexual diversity will breed tolerance and understanding.