(SPOILERS) This movie seems to be saying...
... that homosexuality is a choice, as opposed to rooted in biology. Anyone agree?
Well, there's no choice when you're mostly straight or mostly gay. Some people, on the other hand, they're in a gray 'bi' area where they can go one side or the other one (or stay in the middle ground).
This is actually quite common in women, far more than in men.