That explains everything! The reason Sasuke is so gay is probably because his mother was a Yaoi fangirl...judging by her expression, she probably encouraged him into homosexuality from a young age. Truly a revelation for the Naruto fanbase.
Yet, Naruto lusting after Sakura might prove he eventually outgrew these homosexual tendencies as he grew older...while Sasuke cearly is unable to find women attractive. Another cause of prents screwing up their children's lives.