Monkeys (both Old World and New World) use sex as a tool to solve struggles between each other. Unlike humans, they do not have any sexual taboos; nor are they concerned with age or numbers of partners. The only practice that is "disallowed" are sexual unions between mother and son.
It appears as though almost all Bonobos (Pigmy Chimpanzees) are bisexual. They mate like wild and they commonly express their joy by screeching. 66 percent of all females partake in active homosexual relationships.
The females of Japanese Macaque packs have strong connections between each other and during mating seasons they accompany each other as temporary lesbian partners. They demonstrate the sexual bonding between each other and then chuckle to show that they have received pleasure. Male macaques also perform homosexual acts but not among other pairs. They prefer one-night stands. They are male after all! =)
Although it may be hard to believe, American Bisons perform more homosexual intercourse than heterosexual intercourse. The females only have a relationship once when they are on heat, but bulls have homosexual sex multiple times during this period and mating among young males is 55 percent more likely to be with other males.
Homosexuality is also apparent among dolphins. The Bottlenose Dolphin is known as a species which experiences a homosexual period of time and is reputed for this characteristic. Males have oral sex between each other: one dolphin caresses the other dolphin’s penis with his nose and they also rub their penises upon each others’ body.
Homosexual behavior is equally common among Giraffes and they even stroke each others necks for 1 hour before mounting each other. It has been observed that %5 of male Giraffes partake in homosexual activity at any given time.
Kob Antelopes experience lesbian sex twice every hour (wow!) and 8 percent of their activities during mating is homosexual orientated. One female approaches the other female from behind and touches the other female by lifting her leg between the other antelope’s legs.
25 percent of all Australian Black Swans are homosexual and the activities between such pairs can last years. During this period a male may partner another female but then the other male may chase her away after she has laid her eggs. Sometimes homosexual couples may steal the eggs of heterosexual couples or even claim the nest for their own.
Additionally, Walruses have a time frame when they are involved in homosexual activities. When males reach the age of 4, they reach sexual maturity and up to that time may have experienced many homosexual encounters. Older males are bisexual
because they mount females during mating season and spend the rest of the year in homosexual endeavors. Not only do they rub their bodies against each other; they hug and fall asleep together.
Amongst male Grey Whales, homosexual orgies (group sex) are quite common: 5 or so partners perform sliding movements, race around each other, squirt water and rub their penises against each other.
A surprise awaited scientists most prominently in the activities of the beautifully colored Guianan Cock of the Rock which lives in the mountains of South America. Almost 40 percent of males were homosexual and only a few of them mated with females.
When asked why animals engage in homosexual behavior and/or activity, Linda Wolfe, head of East Carolina University's Department of Anthropology replied, "You can make up all kinds of stories: Oh it's for dominance, it's for this, it's for that, but when it comes down to the bottom I think it's just for sexual pleasure."