My father was not tender to me. He may have never received any tenderness from his own father. We had a relationship of power, authority and rivalry, which was accompanied by respect but also conflicts.
I am very tender with my son. We have a relationship of mutual love, with a perfect, almost professional balance that is maintained between austerity and tenderness.
In a purely male relationship, a fight begins. A struggle of challenge, domination and, ultimately, acceptance. The son by the father. The father by the son.