A recently retired doctor watches an old fighting bull saved after a victorious fight, as the the elderly but still energetic beast romps on his green pasture. 'What does he have that I am missing?' He cannot stop wandering. Told in a humorous way, Aging Bulls explores the rapidly progressing science of male aging. Shot in hospitals, laboratories as well as on the rodeo arena and during a bullfight, this movie features interviews with renowned scientists in the USA and Europeas well as pointed remarks of some female beach-goers, who try to define, 'What makes a man and old man?'