As a baby you were very supple and were almost as fond of sucking your toes as you were of sucking your thumb.  As you grew the suppleness remained and you were able to pop your foot behind your head with ease.  You could not only touch your toes, but also lay your hands flat on the floor.  Even after fracturing your vertibrae you rebuilt your suppleness.  As someone who has never been able to touch my toes (even as a child), I found this bendiness very impressive!