In my opinion I think your born that way, obviously as a baby your not gonna know who your attracted too , your brain process isn't even working yet at that age but as you grow up you get to know some people and you get attracted to them , its all in your own taste just like music , some people lisen to what thier friends listen too but me personally ill listen to anything that sounds good just like if I where to be gay I don't have any controll over it i just like what i like idk if that makes sense