Every three hours,  my wrist-watch beeps.  Just one beep - very brief and very, very quiet.
 
"I need to fix that," I thought to myself.
 
And why - did I tell myself - did this watch needed to be fixed?
 
"So if I'm hiding from a killer, my watch won't beep, so the killer can't find me."
 
Yep, Paul.  That's why your watch needs to be fixed.