How do you define the word "natural"? The Merriam-Webster Online Dictionary defines it as follows:
1. based on an inherent sense of right and wrong <
natural justice>
2. being in accordance with or determined by
nature
3. having or constituting a classification based on features existing in nature
Homosexuality is not morally wrong.
Homosexuality is in accordance with nature regarding the fact that a minority of animals, and a minority of humans practice it.
If you are implying that homosexuals generally have more health problems than heterosexuals do, that is true, and all major medical organizations know that it is true. The main issue is what homosexuals should do about their homosexuality. What do you recommend that homosexuals do about their homosexuality?
People who develop a homosexual sexual identity, and practice same-sex behavior do what feels natural to them, just as heterosexuals do what feels natural to them.