What To Wear At A Sailor Party

I definitely be getting ignorant.
is increasingly common to hear someone was or is a "friend of friends." I do not understand, really. When you're friends with someone is supposed to "that someone" turns out to be, precisely, your friend and, therefore, if you're friends with someone you that: FRIEND OF YOUR FRIENDS.
I think that before we said so and so was a good friend, period, without further explanation.
Maybe it should now be clear that you can not be "friends of friends of another" does it? Sure, sure: they refer to that. We now have social networking internet and we're starting to get used to also treat the friends of our friends and, of course: friends, friends, what is said "our friends" are not. Phew ....
that swarm of friends of friends of friends. That must be why we now need to emphasize when you die so and so and say that in addition to attorney and father of three children, a lover of cinema and good food, was very "friends of friends" ...
You might think that it also was a friend of friends of friends of friends and, of course: no plan.