Quote Originally Posted by LeftEyeNine
Genetics, hormonal irregularity, environmental conditions all add up, I think.

However, can we sum it up as the Greeks were the first ones who were historically recorded to be having homosexual relationships ?

And what is the reality about Alexander the Great's preferences ? I heard that his personality was reflected like a homosexual's in the movie. How far is that true ?
That preumption is mostly based on some scholars who judging by themselves are describing ancient Hellenes as homosexuals, homosapiens, etc...
There were strict laws against it, a homosexual couldnt vote and participate in public debates.
In Sparta it was forbidden to have sexual relationships with boys:
«Ει δε τις παιδός σώματος ορεγόμενος φανείη, αίσχιστον τούτο θείς εποίησεν εν Λακεδαίμονι μηδέν ήττον εραστάς παιδικών απέχθεσθαι ή γονείς παίδων απέχονται» (Ξεν. Λακεδαιμόνιων Πολιτεία 11, 13)
«If someone, being himself an honest man, admired a boy's soul and tried to make of him an ideal friend without reproach and to associate with him, he approved, and believed in the excellence of this kind of training. But if it was clear that the attraction lay in the boy's outward beauty, he banned the connexion as an abomination; and thus he caused lovers to abstain from boys no less than parents abstain from sexual intercourse with their children and brothers and sisters with each other» Xenophones' Constitution of the Lacedaemonians 11,13

Another quote from Maximus Tyrtius:

«ερά Σπαρτιάτης ανήρ μειρακίου Λακωνικού, αλλ΄ ερά μόνον ως αγάλματος καλού, και ενός πολλοί, και εις πολλών. Η μεν γαρ εξ ύβρεως ηδονή ακοινώνητος προς αλλήλους.»

«The Spartans like the beauty of the body. But the carnal attraction is throwned upon»

Last Ailianus states:

«Ο Σπαρτιατικός έρωτας δεν είχε σχέση με αισχρότητες. Εάν ποτέ κάποιος έφηβος τόλμησε να ανεχθεί ασέλγεια σε βάρος του είτε εάν κάποιος έφηβος επιχειρήσει να ασελγήσει σε βάρος άλλου, δεν συνέφερε κανέναν από τους δύο να καταντροπιάσουν τη Σπάρτη. Και σε τέτοια περίπτωση, κρούσματος δηλαδή, ή εξορίστηκαν ή κάτι χειρότερο, έχασαν τη ζωή τους» (Ποικιλ. Ιστορ. 111, 12)

The Spartan love had nothing to do with sexual acts. If one teenager had tolerated to be sexualy harassed or sexually harassed other, it was againts both to shame Sparta. In this cases they would be banished or worst lose their lives.»(History 111, 12)

Hellenes