If only sexual orientation was a matter of choice! I can see it now: "Today I'm feeling a bit jaded and want a change. I think I will choose to lust after women."
It's funny how some people out there still imply that sexual orientation is as simple as a choice. Yet if you said to a straight man, "So, if you chose, you could feel sexually attracted to another man, could you?" he would probably fly into a very defensive posture, if not hit you for implying his "manliness" is as paper-thin as a choice.
It reminds me of a joke I once read:
Bill: "I've just been to a ex-gay convention. I've never seen so many hot and horny guys all in the same room struggling to overcome their sexual desire for one another!"
Ben: "An ex-gay convention filled with hot and horny men?! Doesn't sound like it was very successful then, does it?"
Bill: "I beg to differ. It was very successful: I've never had so many lays in all my life!"