Lots of people do it.  They cut their hair after a break-up.  Is that why John Mayer did it?  

It was recently reported that John broke up with Katy Perry after just a few months of dating.   On Saturday, August 25th, John was spotted at Sky Bar in Los Angeles with a much shorter (and much better looking) haircut.  No word on why he cut his locks.  I'm guessing, it was beginning to itch.