Real men marry their women, they don't treat them like unpaid whores. Quite frankly, I can't imagine why any woman would want to be treated like an unpaid whore.
Just remember, co-habitation doesn't equal a marriage commitment, because it is not an exclusive relationship. Both partners are free to date others while only co-habiting, and neither has a right to freak over that or to expect exclusivity, without them being married.
One more thing. Please, please, both of you use birth control if you co-habit. Kids do better in two parent households, not in temporary shack-ups.
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If a man does not keep pace with his companions, perhaps it is because he hears a different drummer.
Let him step to the music which he hears, however measured, or far away.--Henry David Thoreau