Nemoto Asami, a mother of one, has been married for 22 years. With firm skin and a perfectly defined figure, she is often mistaken for someone in her 30s, but she is actually 50 years old. "The secret to staying young is... sex (laughs)." The hormones secreted during marital activity are the best anti-aging agent. However, in recent years, as her husband's physical strength has declined, their sexual activity has become quite bland. As she began to feel a lack of pleasure and hormones, Asami...