Second Opinion
I will ask for a second opinion on a particularly complex case that I am unsure exactly what to do. I do know the various options, but it is sometimes really reassuring to ask a senior colleague what they would do in the same situation, and likewise they often ask me for second opinions, and this is no reflection on them that they don't know what they are doing. It is just that comfort blanket of someone else saying "yes, that is the right thing to do" for that patient.