Is homosexuality innate? There is a widespread belief that one chooses to be a homosexual, and that people can successfully overcome such feelings. On the other hand, some scientific studies have shown that finger length may be linked with sexuality: > It has long been suspected that high levels of androgenic steroids in the uterine environment have a musculizing effect on the fetus. Furthermore, several psychiatric organizations claim it is not a choice, but disagree on whether it is completely innate, affected by early childhood, or whether we really have any clue at all! So, as far as we know now, is homosexuality a matter of choice, nature, or nuture?

Here is a good breakdown from a grad student on twin studies. However, the key thing to note reading through it is the re-iterated theme that most research to date has not been of a sufficient sample sizes to be able to claim to represent homosexuality in general.

How we define "homosexuality" is also very much up in the air, particularly with prison populations. When do two inmates having sex count as homosexual?

As far as we know, from a truly skeptic viewpoint, **we just don't know yet what "causes" homosexuality**.

I will add, as an aside, that this is insanely hard to research. 95% of all pages I get are strongly activist for or against.