Seven months pregnant, my hand on my aching back, I stood in line at the post office for what seemed an eternity.  

"Honey," said a woman behind me, "I had back pain during my pregnancy. I was bedridden for four months because my baby was sitting on a nerve."  

The man in front of me piped up... "You'd better get used to it now. Once those young ones get on your nerves, they can stay there till they're 18."