Anthony Arak will discuss the bizarre adaptations of peacocks, birds of paradise and other "lekking" species, whose fantastic ornaments seem purely designed to tickle the fancy of members of the opposite sex. How did such elaborate ornaments evolve? Is the peacock's tail purely a device for exploiting the aesthetic sense of peahens, or does it carry a deeper message, perhaps as an "honest" signal of the male's ability to survive. Why it is usually males, and only rarely females, that possess gaudy ornaments? The ideas around Charles Darwin's theory of sexual selection still remain highly controversial 150 years since Darwin proposed his theory. To explain the existence of beauty in the natural world, various competing hypotheses will be presented. Finally, we will ask the question of whether sexual selection is relevant to human behaviour. Are the highest products of human culture - art, dance, music, language and humour - merely mating devices? Anthony invites you to come along and see his etchings!