If somebody isn't sure where they stand on this issue, they may find this of interest: Dr. Robert Spitzer Interviewed In 'Christianity Today' Magazine. Read that very carefully. Take special note of who Dr. Spitzer is, what he used to think and what he thinks and says now.
Now couple the above with the very important results of the Twins Studies, a summary of what science has stated and the extremely important growing number of ex-gays. After reading the above links you should have a better understanding of the issues.
As you can see below, there are many more articles on the subject.
Just to be fair though...have they found a heterosexual gene?
In my opinion based on anecdotal evidence I can count without taking my shoes off, homosexuality seems to crops up from childhood trauma/deficiencies.
It is funny to hear homosexual advocators condeming an unhappy gay man using counceling to become a happy straight man....but whole-heartedly take to the idea of an unhappy man getting his penis chopped off to become a happy sort-of-woman.