Thought about sex today? Of course you have! It's about the most natural thing any animal can do. But have you ever wondered how human sex compares to that of other beasts? It's far from merely inserting part A into slot B. The sex lives of our animal cousins are fiendishly difficult, infinitely varied and often violent. They involve razor-sharp penises, murderous cannibals and chemical warfare in an epic battle between the sexes.Join renowned biologist Dr Carin Bondar on a fascinating journey from puberty to old age across the entire animal kingdom - it will forever change your idle daydreams about the nature of sex.