Well, to be fair - when I say “my husband” that doesn’t talk about sexual preferences any more than saying “my wife.”
I don’t see how that’s talking about sex, do you?
The point is neither should matter, and I would argue, neither should be known, in the workplace.
The real issue is that this is only a problem in one direction: nobody complains when someone says “my wife,” and some people definitely complain when someone says “my husband”.
It definitely gets made about sex, and gay sex specifically, by the people making the complaint. They’re the ones making it about sex and not leaving it alone as a conversation about one’s spouse.
My coworkers have no need to know if I am in a relationship, have children, etc. If they ask I will (and do) tell them I am not interested in having that conversation and I will never ask them or engage further if they bring their partner/spouse/children up.
I'm there to do a job and leave as quickly as possible upon completing the days work. Everything else, in my opinion, is a distraction hampering that goal.
So - we have to deal with the world we have, which is "many, if not most, workers share some degree of personal information about their lives in the workplace." That's the reality we have to deal with.