I know what the dictionary definitions are for few and couple. Not looking for reciting the definition or etymology.
I would like someone to tell me in common usage is it appropriate to call 3 of something a couple or to call 2 of something a few?
This comes from my workplace. I work in a very global setting. In emails and on conference calls often people will say "a few" when they are talking about two things. Or "a couple" when they are talking about three things and sometimes more.
Are there any regional/social/demographic based differences?
For instance my grandma often uses the terms interchangeably and might go back and forth with the two words about the exact same topic. What is the cutoff point for couple and a few?