With my partner, she had to learn/agree not to ask me if I agreed with her, because often I did not or at least not completely and I am extremely unwilling, if someone asks, to just go along with a blanket yes or no as to me it is not accurate and I fear I may be committing to something I do not mean. Sometimes she would point out she did that for me (just agree even when she was not in full agreement). I was flabbergasted as to why she would do that - it is not something that matters to me and it sometimes got us off track because she would think me not grateful enough for her support, and I was all off on I did not want or view that as support and wanted her to stop as it seemed like trapping me. I have tried to explain that I know she is an adult who can take care of herself, why would she need me to jump in to "support her" when I have no stake in the argument one way or the other and in fact usually think it could be handled differently if she did not want the argument. I have learned to not give this as an explanation right away and to just say "there there" rather than explain how I could see the other side's argument as at least a valid argument.
These are just some examples. And we do tease about "stopdog speak" (as she thinks she is the more usual in this situation and I don't disagree in terms of what I observe others doing). I also have a great resistance to doing what is to me, ganging up on someone else. So if partner disagrees with Person X and Person X disagrees with partner - I feel the situation is evenly matched and does not need me. If Person X had several people agreeing against partner, and I did not think partner wrong, then I might opine in partner's position. If it looks like partner and others are against Person X, I am almost always going to defend Person X.