I recently had a follow-up ultrasound of my kidneys and bladder from a kidney stone episode I had last year.  (I wouldn't wish kidney stones on my worst enemy, but it luckily passed quickly.)  Anyway, I was told to show up with a full bladder for my appointment.  I did and then had to wait an extra 1/2 hour, because they were behind schedule.  I was really, really full when the very young, attractive ultrasound technician called me in to the small, darkened exam room.  She sheepishly asked if my