growing and shrinking

Little Jimmy asked if me I was the "baby" of my family... I replied that I was second to oldest that his uncle Bruce was by far the youngest. Jimmy got a puzzled look on his face and said "Bruce can't be younger than you, mom, he is too tall." I explained that adults stop growing when they get to be 18 or so so height isn't exactly a good judge of age in grown-ups, I then added sometimes when you get really old you can even shrink a little.
"Oh..." he said "that's why you are so short."

watch it kid.....