, or extroverted Feeling
is dominant for ExFJ, secondary for IxFJ, tertiary for ExTP and inferior for IxTP. It is an attitude that encourages adherence to the ethics of the cultural/social/familial groups we feel emotionally connected to. Fe leads you to derive your moral viewpoints from some sort of externalized consensus. This doesn't mean you automatically fall in line with whatever moral viewpoints happen to surround you, just that (unlike the accompanying Ti view on logic as something you don't need external input to understand) you don't see how ethics can be decided reasonably without some sort of external context. (Fe views ethics as dependent upon collective consensus in the same way Te views logic/impersonal ideas.)
Fe leads people to adjust, hide or set aside entirely their own emotions in favor of fitting the emotional needs of the broader groups that are important to them. This leads to a certain respect for the common consensus among those important groups regarding interpersonal behavior and treatment of others. If you were to criticize someone's behavior from an Fe standpoint, it would be from the standpoint of, "Your behavior is inconsistent with the group's standards--most people would consider it wrong or inappropriate." Fe appeals to the collective morality of the whole; the fact that "most people would agree" serves as externally objective evidence to support Fe's moral standpoints.
People with strong Fe are typically good at saying just the right thing that fits in with the moral expectations of the audience. For this reason Fe tends to make great politicans because strong Fe users often make outstanding, charismatic public speakers who can play off the emotions of others to rally groups toward the desired cause. They are excellent at organizing, leading and delegating tasks to others with an interpersonal style that gets the job done while still appearing socially appropriate and respecting the emotional needs of others (so long as those needs are reasonable within the group's objective framework of ethics.) They understand how to perform the social/cultural responsibilities expected of them and they expect others to do the same, and if you're not fulfilling these responsibilities they're very good at appealing to the crowd to deliberately make you look like an asshole in front of everyone. ("Look everyone, this guy doesn't fit with our collective moral ideals!")
Fe considers it paramount to show overt displays of loyalty to the people in the groups it feels connected to, which includes helping out friends/family whenever possible and receiving similar displays of loyalty in return. (If these displays are not reciprocated Fe may take this as a sign that the other person is not loyal.) Fe tends to see Fi users as selfish for refusing to adapt their feelings to the feelings of others in service of the good of the larger group, and for ignoring objective standards on ethics in favor of purely personal ones.
The whole idea behind Ms. Manners is very Fe--Fi would wonder why anyone cares about any external consensus on ethics, because to Fi ethics are purely subjective. Fe is concerned with adjusting to the ethical standards as established objectively by the groups it feels are important.