I used to carry my 5yo son from evening child care during conferences to the car or bus parked quite far away. I’d pick up my sleeping child in my arms and whisper: Be light! One evening, a gentleman offered to carry the child. Before we got one quarter of the way to the car, the man stopped and said: This child is heavy! How do you ever carry him by yourself all the time? Hmm, indeed… how ever did I?