[AppyPappy]

< liberal > If you are a homosexual, you were born a homosexual. If you later decide you are attracted to women, you were born a heterosexual. But if you then decide you perfer men instead, you were born a homosexual. But if you later decide you really like women, you were born a heterosexual. < /liberal >

[Miles Vorkosigan]

Actually, their official line now is that you can't change from being a homosexual. Presumably, everyone who's decided he's "gay" is right the first time, but apparently a number who decided they were straight weren't.