By the way, see below. Plato besides advocating an utopia based on rule by philosopher kings also had definite views on sexuality and other matters.
"Plato was born in Athens, Greece in 469 B.C. He was the student of Socrates. Plato founded a school that might be one of the world's first universities. The school was on the land of a prominent Greek known as Academus. This is where the term "academy" came from. Plato wrote about dialectic and Socrates' philosophy that encouraged people to examine their way of thinking and explore their ideas. Plato's works consist of a series of dialogues and discussions.
"While many men in Greek society practiced bisexuality by taking both a wife and a male lover, Plato is notable because he advanced the belief that some men are inherently homosexual, just as some men are inherently heterosexual. Plato believed that love between two men is superior to that between a man and a woman. Plato called this love "uranian" love and suggested this love was ruled by a different aspect of the goddess Aphrodite. At a time when male homosexual love was unequal between an older man and his student, Plato advocated for these relationships to become equal and based on reciprocity. Also, in contrast to Greek custom, he believed that these relationships should be life-long. To Plato, love is more than just the physical act, and the goal of love is the moral and intellectual improvement of the younger partner with the help of the older one. This is has come to be known as "platonic" love. Over time the term has become distanced from its roots, and is used to describe non-sexual love and friendship.
"In his Symposium, Plato suggests that mankind was originally made up of complete beings. Mankind originally had three genders that were a fusion of two human bodies. Some were male-male, some were female-female, and some were male-female. These beings were round, had two faces, had four arms, and reproduced asexually. These beings were complete, incredibly happy, and even arrogant. This angered the gods who were incredibly jealous. The gods split these beings in half, which is the present state of mankind. We all search for our other half in hopes of becoming whole again.
"In The Republic, Plato advances the idea of an army of male lovers that becomes the model for the Sacred Band of Thebes. He believed that an army of lovers would be stronger than an even an army made up of a family or tribe. Soldiers would have a vested interest in protecting their lovers, and in fighting so as not to lose face in the presences of their beloved.
So there you have it. In 2500 years we have come full circle. Perhaps the judges will now rule "tell, don't ask" as the norm for both the military and life.
While there may be passages in Plato which imply acceptance of pederasty, in his last work, The Laws, he speaks as if he considers homosexuality to be contrary to nature. For example:
However, God willing, perhaps we'll succeed in imposing one or other of two standards of sexual conduct. (1) Ideally, no one will dare to have relations with any respectable citizen woman except his own wedded wife, or sow illegitimate and bastard seed in courtesans, or sterile seed in males in defiance of nature. (2) Alternatively, while suppressing sodomy entirely, we might insist that if a man does have intercourse with any woman (hired or procured in some other way) except the wife he wed in holy marriage with the blessing of the gods, he must do so without any other man or woman getting to know about it. (Translated by Trevor J. Saunders)
Plato doesn't "suggest" this; the poet Aristophanes suggests it.