coincidence?

You jog pass a person you know.You shook hands with that person.You continue your jog.Is it a coincidence that when you turn around to catch a final glimpse of that person,that person just turned his head back forth after catching a glimpse of you?I mean,it's like aren't you done staring at that person?

Is it a coincidence that every time you sneeze into a tissue,you pull your head back and stare into it for a few seconds or so?I know sometimes it's colourless,sometimes it's yellow.It can even be a greenish-yellowish colour.But are you serious?

Is it a coincidence that every time you get good news,like getting a new boyfriend/girlfriend or getting an awesome birthday present,you tend to move around very quickly.Fast paced.The adrenaline rush i suppose?

Would you call it a coincidence if a person listens to blues or love songs all day after having a bad time or during those hard times in relationships?Songs are part of our lives.But no need to get all mushy mushy.