Dr Robin Baker was Reader in Zoology in the School of Biological Sciences at the University of Manchester from 1980-1996. Since leaving academic life in 1996, he has concentrated on his career in writing, lecturing and broadcasting. He has published over one hundred scientific papers and fourteen books. These include the international bestseller SPERM WARS, which was based on his own original research on human sexuality, and SEX IN THE FUTURE on which this article is based. His work and ideas on the evolution of human behaviour have been featured in many television and radio programmes around the world. He has six children and has lived in Manchester since 1974.