Is being gay a choice?

This question seems to matter to a lot of people, but I can't really see why it does.

That's not true. I know why it matters to some people.

This seems like a clear example of the Deontological/Consequentialist divide in ethics, in a popular ethical discussion.

My position is, obviously, that I don't care why. If being gay is a choice, then choosing to be gay is making someone happy, so they should go for it. Laws should arrange themselves around persons for the maximum amount of happiness possible.

But some people really seem to care if it's a choice.

Of course, I really don't believe in "choices" at all. So there's that.