From an evolutionary and biological perspective, animals are driven to have sex in order to procreate. But there is a lot more to sexual relations between animals. Animal sex is at least as strange and varied as human sex. A male might copulate with many females. And female animals of many species can be choosy, too. Homosexuality is common. Monogamy is rare. And the animal kingdom is full of swingers. In short, with animals, sex can be wild.
Though their serpentine locomotion might be off-putting to some, when roundworms do the deed, they're surprisingly graceful. A simple animal with only about 300 neurons, C. elegans is a common model organism in biology laboratories. But its reproductive s
Though they may look different, penguin mating behaviors are surprisingly similar to other birds. Even so, each of the 18 penguin species has its own little mating quirks, with some doing a look-see of the male's bachelor pad before shacking up.
Live fast, die young. Males of some insect-eating marsupials survive less than a year before mating until they die. They follow this strategy to increase the number of offspring they can sire, a study shows.