Cool, a topic on homosexuality.
I used to volunteer on a website, helping out gay/lesbian teenagers (mostly).
I, myself, am not definite.
I wouldn't classify homosexuality as a disorder.
I am not sure about people born gay but I highly doubt that being the case.
There are a few reasons why a person is gay in the very first place, mainly due to environmental factors or past hurts (any form of abuse, ranging from physical to emotional and including verbal abuse, rape, and molestation). Divorce in the family increases the chances of the house raising homosexuality. A demanding parent affects too.