Well as you are asking for my two bobs worth I'll give it too you.
I think that it might well be genetic or it might not be but even if it is genetic there is a choice involved. Yes there are the urges and what-not that the genetics create but as a rational human being someone with these urges needs not give in to them.
It comes down to choice in the end.
Our own choice of whether to give in to our urges or not.
I mean there are thousands of men out there right now enjoying using devices that look like flashlights. Their not sexually attracted to them but that doesn't mean they can't happily live with them and be sexually released by them.
I know that this statement can be applied to all those possibly genetic disorders but I'll say right now that love doesn't need to = sexual attraction.
THE BIG EXAMPLE
My girlfriend and I have been together for well over 1 year.
Now she finds herself attracted to other girls more than members of the opposite sex yet our relationship is the best and longest lasting. It's also the first relationship where she ended up moving in with the person she was dating.
Hence Sexual attraction does not take away free will/ does not innfluence love so the excuse of "I can't help myself" cannot be taken seriously.
TY