This is a REALLY great short on whether or not homosexuality is a choice. One of my favorite things to take away from this video (there are many) is the fact that:

The American Medical Association, the American Psychiatric Association, the American Psychological Association, the American Psychoanalytic Association, the American Academy of Pediatrics, and the National Association of Social Workers have all stated that homosexuality should not be treated as a mental disorder and that homosexuality is not a choice, and cannot be changed.

Suck it homophobes ;]