Your example doesn't prove the point. I didn't say that police wouldn't investigate a "weapons disturbance," and then stumble upon the sexual misconduct. Look, I understand the phrase is meant metaphorically, so it's a silly conversation, anyway. As I said, I don't support such laws.
As for homosexuality being a choice, did you choose to be heterosexual? When did you choose? What made you opt for the one over the other? Could you now decide not to be heterosexual?
Your questions assume that the two sexual orientations are the same in this respect. That is the first weak point in your approach. You might as well ask someone why they opted for [insert odd sexual predeliction here]. You may as well ask a child why he chose to have an irrational fit of anger and break his bicycle. The child can't point out a time, place or set of reasons for the choice, but he is blamed for his behavior, nonetheless. No one imagines that he couldn't help himself. In any case, it was Antibubba who based his argument on determinism, so it is up to him to demonstrate:
a) That homosexuality is determined by factors without the control of the homosexual.
b) That what is natural is always desirable.
As to the last question, we know that some people switch between orientations. We also know that some homosexuals have deliberately changed their orientation.