Gay genes?

Interesting article on IFLS that I came across today, discussing the possibility of "gay" genes or, and perhaps more accurately, genes that cause strong attraction to either males or females, regardless of what gender the individual is. 

The article can be found here. IFLS and another, more details one on The Guardian site. 

What seems to be the case is that a region on the x chromosome (females have two x chromosomes, males have one) and a region on chromosome 8 has been strongly associated with male sexual orientation. It doesn't seem to be a single gene but several genes within these regions that somehow contribute to sexuality. However, the genes are not the only influencing factor as environment and epigenetic factors can and do also play roles in how our genes are expressed. 

Not all gay men will have these genes and while this verifies an earlier study indicating that homosexuality is heritable, the science is still relatively new.   

What I find interesting is the potential link between men and women and how this affects attraction, as discussed in the IFLS article. Do both men and women who inherit these regions show strong attraction to males? Is this an example of balanced polymorphism as suggested? Interesting speculations and certainly worth keeping an eye on in the future.