Are you sure Emoborg?
I really saw how Mac and Don could have fallen into a mistake during that conversation because they weren't paying attention to the words they were using, but neither of them actually noticed what almost happened.
There was a TV show or Movie, I for get, but a minor female character says to the hero who is hopelessly and unrequitedly in love with a different woman... "You're not in love with me, and you don't have the balls to tell Karen that you love her, so until that changes, and you and I arn't doing anything better, why don't you just consider me. No strings, no expectations, but just consider me."
(Which was a lie, because minor female character was in love the hero and was pissed off at him ignoring her every time she threw herself at him.)