"Homosexuality," Plato wrote, "is regarded as shameful by barbarians and by those who live under despotic governments just as philosophy is regarded as shameful by them, because it is apparently not in the interest of such rulers to have great ideas engendered in their subjects, or powerful friendships or passionate love-all of which homosexuality is particularly apt to produce." This attitude of Plato's was characteristic of the ancient world...
http://www.fordham.edu/halsall/pwh/1979boswell.html
"In his Symposium the ancient Greek philosopher Plato described three sexual orientations (through the character of the profane comedian Aristophanes) and provided explanations for their existence using an invented creation myth. [1] Aristophanes' fable is only one of many perspectives on love in the Symposium, and should not be considered identical with Plato's own ideas. Most of the Symposium's speeches are intended to be flawed in different ways, with the wise Socrates coming in at the end to correct their errors.
If you want an education rather than a means of affirming your a priori beliefs it would be wise to read Answers.Com entry on this subject which can be found here: http://www.answers.com/topic/terminology-of-homosexuality.
Incidentally, Foucault, a homosexual and an atheist, nailed the problem for Christians here:
...Post structuralist theorist Michel Foucault has argued that homosexual and heterosexual identities didn't emerge until the 19th century; before that time terms described practices and not identity. Foucault cites "Westphal's famous article of 1870 on 'contrary sexual sensations'" as the "date of birth" of the categorization of the homosexual (Foucault 1976). The point here is Christians condemn the sin but do not reject the sinner as beyond redemption. Just read any FR post on homosexuality and you find a hatred and rage that makes Hamlet's death wish seem like the chuckle of a freckle faced boy.
God knows everyone and uses everyone to make his point--even people identified as "homosexuals."