Compare the portrait of the father and the son.
John's father is a tall, heavy man of 45. John is a tall, thin boy of eighteen.
John is tall, his father.
John is thin, his father.
John is young, his father is 45.
John's father loves sports and he doesn't spend much time reading. John doesn't play any sports. He is more interested in reading books.
John spends his time reading, practising sport.
His father prefers practising sport, reading.
Just his father spends a lot of time practising sport, John spends his time reading.