If Miss-es Have to Get Married to become "Missus"-es, Why Don't "Master"s Have to Get Married to Become "Misters"?

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I am Mister Hubbard. That's fine, except there's no "Missus Hubbard" (unless you count my mom ... divorced from my dad, but still keeping the name). Why aren't I 'denied the title Mister' until I get married? (I bet some girls gonna say, 'Well, Miss-es who aren't married CAN use "Ms. (Miz)" http://www.etymonline.com/index.php?allowed_in_frame=0&search=ms. " ... to which I reply, 'Yeah, but do men have that kind of option!?"