Father and son

What is a father? What is a son? What bond links them? Blood? Love? Legacy? Inheritance? I photograph fathers, 30 to 80 years old, standing up, bare-chested, with their son, months-old for the youngest or already in their fifties for the eldest. They are close, often skin to skin.
Looking at these portraits, you search for similarities. You scrutinize the facial features, compare the gestures and attitudes. You imagine a story. Attempt to discover the secret of a relationship. Nudity disturbs and scrambles the clues a bit.