Like much in the field, this is something of an open question. You can fill literal libraries with material on this subject and still not get a clear cut, concise answer to this.
However if you honestly believe it is a choice, then I have to ask you when you decided what your sexuality would be. Because chosing your sexuality is an experiance I cannot relate to.
It's likely a mixture of genetics, hormones, and social factors. What's interesting to me is that homosexuality can be found in hundreds/thousands of animal species from high-order mammals to cephalopods. Whether or not being gay is a choice or is genetic or whatever else, it's clearly natural.
Like much in the field, this is something of an open question. You can fill literal libraries with material on this subject and still not get a clear cut, concise answer to this.
However if you honestly believe it is a choice, then I have to ask you when you decided what your sexuality would be. Because chosing your sexuality is an experiance I cannot relate to.