I find the context in which some men refer to their wives as "The Admiral" to be sexist.
Yeah, that always strikes me as a bit off. That and the SWMBO thing. I understand the spirit in which it's used, but it just doesn't come off quite right for me.
That being said, when my wife saw our new (used) boat parked in the driveway she said "Well then I get a leather sectional sofa for the basement," and I said "Yes ma'am."