By Michael Marshall. The urge to reproduce, to pass on our genes to a new generation, is one of the most powerful in our lives. This is equally true of the bewildering variety of animals with whom we share the planet. And they have an equally bewildering variety of ways of going about it. Our opinion editor Amanda Gefter recently visited an exhibition entitled The Sex Lives of Animals , which seeks to overturn the idea that animals engage in sex purely for procreation.
It's rumoured that Linda Lovelace couldn't even say the word "dog" after she was forced to fuck one. When Lovelace moved to New York with her infamous pimp-husband, Chuck Traynor, she did 8mm films to earn the couple extra money. Perhaps her most rare and sought after by porn collectors is her bestiality 8mm. She would say ' d-o-g '; there's a ' d-o-g ' over there.
Animal sexual behaviour takes many different forms, including within the same species. Common mating or reproductively motivated systems include monogamy , polygyny , polyandry , polygamy and promiscuity. Other sexual behaviour may be reproductively motivated e. When animal sexual behaviour is reproductively motivated, it is often termed mating or copulation ; for most non-human mammals , mating and copulation occur at oestrus the most fertile period in the mammalian female's reproductive cycle , which increases the chances of successful impregnation. Females often select males for mating only if they appear strong and able to protect themselves.
Sex chromosomes influence physical differences between male and female animals, such as feather patterns in mandarin ducks. In most animals, sex chromosomes help determine whether an individual develops as a male or female. Sexes of some animals, such as most male arachnids, lack a second sex chromosome entirely.