for abrosexual, it can change in the blink of an eye, or it can only change after a huge event. i have this problem, where i will change from straight, to queer, to aroace, to pan, and back, over the course of an hour, depending on my mood and who i see and think about. usually it's for fictional characters... :} but yeah, it's good if you don't know who you like yet or what to do, but it's very under-appreciated. anyway, hope this helps!