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.
During mating, the male sea turtle will reach his tail underneath the back end of the female's shell. His long penis, which can be almost half the length of his shell, will emerge from his cloaca to penetrate and inseminate the female's cloaca.
During copulation, lasting 40 to 70 hours, the female cave inserts her penislike gynosome into the male organ to collect sperm. The female's lengthy penis would be the equivalent of a 5 foot 9 man having a penis about 9.8 inches long.
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