Homosexuality, biological or choice.

I read an article in the Los Angeles Times titled "Study Links Male Gays, Birth of Older Brothers", on June 27, 2006, and although I am encouraged that there is more support for homosexuality as a biological condition instead of a life choice, my questions to the gay community would be: Is it possible to be sexually stimulated by the opposite sex? If so, under what conditions could you be sexually stimulated by the opposite sex? If you could change your sexual persuasion, would you? Were you ever angry at your parents for your homosexual condition? Dr.Jo, do you have any thoughts about this?