Are you suggesting someone can have an action that is counter to their sexual attraction?
I find it downright absurd that you would suggest anyone LACKS the ability to take actions that don't follow their sexual attraction.
No one's attraction prevents them from being with someone who isn't exactly what they are attracted to. I'm sexually attracted to natural blondes, but that didn't keep me from choosing to be in a relationship with a brunette several years ago.
You realize sexual attraction isn't "hmm...what am i in the mood for today?"
Obviously attraction doesn't always change that quickly, but I hope you realize it CAN and DOES change for many people in a variety of ways.
So when you made your choice, how did you know to pick a girl instead of a boy?
I made the choice based upon a variety of factors, including both physical and non-physical attraction. However, that is not to say that I couldn't have made a different choice.
I would be freaked out if I woke up tomorrow suddenly attracted to men.
I'm not suggesting these changes happen overnight, but it is undeniable that they DO happen for many people.
People's tastes, preferences, and opinions often change throughout life. There's no way to deny that.