OK, first of all, you know damn well I'm not PC at all, so I'll thank you not to bandwagon me :)
So what you are saying is this (correct me if I'm wrong):
1) Homosexual behavior is a choice.
2) Homosexuality, like murder, is defined by ones actions, not by ones desires.
Therefore, by these arguments (again, correct me if I went astray):
Since sexual orientation is established based on behavior, not desire:
1) There are no homosexual virgins.
2) Of course, then there are no heterosexual virgins.
3) A man who is married to a woman, had sex with her to conceive only until she became pregnant, but is now totally abstinent. He happens to fantasize about cock on a daily basis. This man is not a homosexual.
4) You, Krellin, were not heterosexual until you lost your virginity.