Fe is simply choosing sides and affirming/denying those relationships.
Don't think F, think Te turned to people. Te asks for no qualificiations except from other functions that give it scope and purpose.
There is no part of Fe that intrinsicly moves your behaviour towards.. public feelings. But you will often see an Fe dominant using sociatal structures as their vehicles of social/relationship organization.
ESFJ's are a great example of that. Guardians of holidays, birthdays and celebrations
ENFJ's work close to the same way, but with Ni instead of Si. Their focuses are displayed differently.