“All I want to know is when are people gonna be wanting to marry these things?”
Soon.
And if we have gay marriage, then how can we deny marriage between a person and a machine?
That’s my point exactly.
Let's assume for the sake of argument that a robot could be built that could pass the Turing Test (this is probably 50 years away...at least). I could see such machines being granted "personhood" under the law, and under those circumstances making marriage a legal option would be reasonable.