You think of a sex and a couple
Well yes- how does that not apply to gay partnerships as well?
Think about how the phrase is used:
My husband- said by a man, you know where you are
His husband- same again
status husband, what do you need to know other than that they are partnered?
Otherwise surely people use names anyway?
I can't envisage how it would be a problem. I say Dh, or Mark.Dh says wife or Peachy.
The only time it could cause confusion is with such things as formal letters or whatever- wedding invites such as 'We request the rpesence of Mr H and ....' and that'#shardly unsolvable: guest, or husband, or name.
And if one does make a mistake from time to time- what of it? On MN: what does your DH think?
Sorry its a DW.
Oh OK what does she think then?
Can't see an issue I am afraid