The global top 10 bisexual animal: terminate mating for hours
In currently has identified more than 1000 kinds of homosexuality existence of animals, including our familiar chimpanzee, giraffes, penguins, parrots, beetles, whales and dolphins, bison, antelope, etc. More than 50% of bottlenose dolphins have homosexual ACTS, and bonobos are almost bisexual.
In the animal world, the natural law of "survival of the fittest" will be more severe, especially in the last race on this important mission, of the individuals who have advantage to win more opportunities to mate with the opposite sex, such as medical stronger lion, hoof bigger bucks will be the female win. When the giant tortoises of the Galapagos islands in estrus, male turtle will by comparing the length of the neck to decide who to mate with the opposite sex, despite the maturing takes 40 years, but the defeat male turtle still have to give up the female, and look for other male lovers. This is like the human world of bisexual people, when a man or a woman after the failure as mates, turning to gay, this leads to the formation of bisexual men and women.
Bisexual animal also helps reduce conflict among groups, such as bonobos is by same-sex mating and the war become invisible. Bonobos as the favorite peace land mammals, and humans have a common ancestor. They use sex to say hello to each other, resolve disputes, in exchange for food.