I've finally heard the gunetiks excuse! I bumped into a girl at the pool the other day.  I hadn't seen her since high school.  She was always a big lady but man, she is full blown death fat at this point.  I did the courteous "how have you been, what are you up to" conversation and found out she isn't currently working.  She proceeded to explain to me that she may never get to go back to work because of health issues and said verbatim "and it's not even weight related, it's just genetics".  I was floored.  I have never heard it in real life.  It was all I could do to not bust out laughing.