I should have specified that I meant 'primarily

attracted" when I said "attracted".

But it is true that my sexuality over time did change. With time and an open mind, yours will like too (to some degree).

You said:
it just really makes absolutely no sense to me that most people think it's "supposed" to change.

Me:
In my opinion, the only thing that will keep your sexuality from budging an inch, is strict idealogical beliefs regarding sex and sexual attraction.

But Sheryl Crow says "change'll do ya good".

And I say "change can be fun, fresh and exciting".

But if staying the same (sexually or in any other way) excites you, by all means I respect that.