My father-in-law has been depressed since the death of his mother-in-law three years ago and now seems to be suffering from erectile dysfunction. Since then, he has tried every day to treat his erectile dysfunction in various ways, including taking supplements and exercising, but has shown no signs of improvement. Seeing him make such a serious effort, he said, "I don't want to worry my mother-in-law in heaven." I can't help but want to start treating him from a psychological perspective...