Final answer:
The alchemist's story about the father's two sons in ancient Rome explores the theme of affection and love in a society that looked down upon such emotions.
Step-by-step explanation:
The alchemist's story about the father's two sons in ancient Rome serves to highlight the theme of affection and love in a society that looked down upon such emotions. In upper-class Roman society, expressing affection towards loved ones, especially between males, was often frowned upon. However, the story emphasizes that despite societal expectations, these men were able to demonstrate their affection towards their loved ones.