The leftards have been looking for that mythical “gay gene” since the 70’s and never found it. Even this year, a few articles came out that there never was one..
MEANING?
The faggots knowingly go homo because they want to.
There are also people who are not inherently homosexual but have been forced into homosexuality by circumstances, e.g. molested as a child. These people tend to be very unhappy.
In either case, it's not normal. A lesion has interfered with the reproductory system.
I suspect that some cases of congenital homosexuality and some cases of transsexuality are the result of chimerism.