Ever since my mother-in-law passed away three years ago, my father-in-law has lost his vitality and apparently became impotent. Since then, he has tried various methods every day—supplements, exercise, and more—to cure his ED, but nothing worked. 'I don't want to worry my wife in heaven,' he said. Seeing him take it so seriously, I couldn't just stand by. I decided to cooperate with the 'mixed bathing' he proposed as a psychological treatment method...