Think of your own father, son. Would you want someone doing this to your father?
When the man was about to be tortured to death he said words to the effect of,
" You must have a father....Think of your own father, son..... Would you want someone doing this to your father? "
How do you know his father did not sexually assault him or beat him or both when he was little?
That may have egged him on.
It was a gamble. It did not work.