This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
The Man-Dog example is called "association"; a Man does not cease to be a Man if the Dog dies.
The examples I have given are called "composition"; an Aeroplane without a Wing is no longer an aeroplane in the fullest sense of the word. And if you disagree, try taking the wings off your aeroplane at 29000 feet