Do we realy need to find the gene if we do will we have a gay test. Will that be used on teachers as a lot out there think it is gays that harm children. Why not spend the time and money in finding the gene that makes men abuse and rap kids and not be picking on thows that are openaly gay as it is not gays that do harm to peopel. I know am geting off the beat just a bit but I say this as growing up gay and geting beaten up and haveing peopel say don't you be going near kids. I was just a kid my self so I say it a gane lest spend the time and money in finding the gene that make man an women yes women harm children. Or fine the gene that make pig headed peopel.

The elephant in the room here is whether identical and fraternal twins really have the same environment. Do two twin boys who look alike really have the same environment as two twin boys who look different?

This is where separated twins can help. There are some identical twins who are separated and raised by different families. If these twins are gay more often than fraternal twins from a similar situation, then genes are almost certainly involved.

Unfortunately, since homosexuality is relatively rare and separated twins is even less common, there hasn't been a lot done on this. One study did show that identical twins in this situation were both more likely to be gay but the study was very small.

I'm not exactly sure what to think on the matter at this stage- it does confuse me a little. I know for a fact that there ARE people who choose to be gay- and this is the most common scenario. I do however, know gays who seem to have just been born that way, and knew it from childhood.

At any rate, it's an interesting question- genetic or not- though i do think that the statement "Since identical twins have the same DNA, this suggests that something genetic is going on.." may be a little premature since there are so many other reasons that people could be gay…be it environmental or psychological, biochemical… it doesn't have to be an in built tendency.