Doctors Office

So I'm sitting here in the waiting room of the doctors office waiting on my sister to get done..while I'm sitting here I get to thinking while I'm watching everyone come in...there are 6 different people in here and we are all spread out..why is it that when people come to sit down they all look for spots that aren't around anyone else...it's odd...is it cause people just don't wanna talk to others, to have that awkward confrontation of having to say hey an put on a fake face if they are rly in a bad mood...is it just cause people are shy or maybe it's cause some people are just rude and don't like others so they try to avoid as many as possible...i dont know what the real reason is, I do it too and idk why...