Men might feel threatened in women-led homes because in classic gender roles men are the providers. (And if this is the case, the 1,500 men who have applied to marry in China might beware).

Either way, female-led millionaire households is likely to become more common. About 22 percent of American marriages have a higher earning wife. Maybe it’s time for guys to get used to wives who make more than they do.

Why do you think there are tensions in women-led households?

-By CNBC's Robert FrankFollow Robert Frank on Twitter: @robtfrank

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