Actually if you had been reading up on it, like on the Symposium, Socrates despite having some hetairae was also into the dudes. And they were into him because he was unmatched in valor on the battlefield just as he was within the Lyceum.
Which brings me to another point about something people do not popularly know about Ancient Greece, because most people, yourself included, base your knowledge of it on Frank Miller comics or the movies based on them. Here's some new info: the Spartans were not the only warlike Greeks. Ever seen Troy? Despite the inaccuracies meant to make it more realistic (ie because the text that movie is based on had the kinds of beings we can't talk about on Head-Fi but somehow it's alright to mention Magni and Modi and Mani) what was representative of what Greece was like even up to the Macedonian hegemony was that every Greek city was actually technically a warrior state. If we're going to go into semantics, the difference with Sparta is that while every other city-state was basically like China, Singapore or South Korea on steroids (mandatory military service for every citizen of age, not just a couple of years), Sparta would be more like if the PLA owned an entire region in China or if the US Marines had their own 52nd state. Macedon later just became what would be more familiar to us now, with society elites serving as cavalry (because they own horses) or as officers, except today it's determined by your military academy ranking than by how much land your family manages, some middle class cavalry and infantry, and then there's the bulk of the infantry usually recruited with the promise of travel, booty, and glory that living as a peasant on a farm will never give you, pretty much like how the Army recruiters promise teens in tha hood to get the INS off their back.
Basically, what I am getting at is that you read actual books instead of going with movies that describe the Athenians as "philosophers and boy-lovers" and imply they were nothing beyond that. Up to the point in history in that part of the movie, Athens's scorecard vs Sparta was actually higher. Sparta helped kick out Hippias, the last tyrant of Athens, but then they treated the city as a client state. The Athenians managed to kick them out, then managed to repel the Spartan army that tried to get Athens back. That makes the score 2-1, and techically, that 1pt that Sparta got is dubious considering it was Sparta's field army plus Athens' citizens vs Hippias' royal guard. The Greeks back then aren't just sitting around the Lyceum with a pen, when a messenger runs in with news of an army marching their way the same citizens walk around with a sword on their belt and then go home to pull down the aspis or hoplon and their dory or spear on top of the fireplace (the kind of thing that people now do just for decoration), and their helmet, thorax armor, and grieves aren't too far away from those.
Similarly, the elite infantry of Thebes was called the Sacred Band, a force of 300 inspired by Leonidas' royal guard, but with a twist: it was made up of 150 pairs of lovers, all male. The idea was partly based on the points raised by Phaedrus in his speech in the Symposium - eros confers great benefits as it inspires one to earn the admiration of the beloved. His example was in showing bravery on the battlefield, because nothing got a Greek man hotter than to see a Greek man thrusting his spear (there's a euphemism there somewhere), as well as how one would feel no worse shame than for one's beloved to see him being inglorious, the same way that in our time you wouldn't want your girlfriend to see that you can't come up with a comeback to a "yo momma" insult. Putting lovers in the same spot on the battlefield basically made their bravery mutually reinforcing. That said, excavations at the site of the Battle of Chaeronea, where Alexander swung around and annihilated the Athenians allowing Philip to get around the rear (snicker) of the Sacred Band, contradicts the popular account (commemorated with a lion monument, because back then there were actually lions in that part of the world) that all of them died on the field because the plot for them had less than 300 skeletons.
The Greeks weren't even unique in that regard. The Romans for example were only scandalized by the rumor that Caesar was seeing a Greek king in Asia not because they were both dudes, but because the rumor was that it was Caesar bending over. So in their minds, a boy descended directly from the line of Aeneas, whose mother was someone I can't talk about on Head-Fi and received warnings for made it seem that it was all of Rome bending over for their client state. Caesar then overcompensated by bedding the wife of every Senator who took that against him.