Why is homosexuality morally right?

It is morally right to some and morally wrong to others; morality is a perspective and personal decision. Well according to my research homosexuality is only a variation of the human race like for example some people like grapefruit some don't so It is only a matter of the randomization of genetics creating a homosexual and it cant be called be called a disease because of its scale and it has only become something natural aprox 30 years after the what is called first human.