When male mice live with female mice, their reproductive years are extended by up to 20 percent.
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.
Male songbirds woo females much like the way cell phone companies lure customers, a new study finds.
It might be a treasured value in many human cultures, but monogamy is rare in the animal kingdom at large. Yet that doesn't mean it's boring.
From male killer whales that ride the dorsal fin of another male to female bonobos that rub their genital together, the animal kingdom tolerates all kinds of lifestyles.