Final answer:
Othello captivated Desdemona by sharing the extraordinary tales of his life, which was a key factor in winning her heart.
Step-by-step explanation:
Othello won Desdemona's heart by telling her the story of his life. This tale of his various adventures and hardships profoundly affected Desdemona, creating an emotional bond that eventually led to their marriage. This sharing of personal narratives is a classic motif in literature, where the act of storytelling serves as a bridge between characters, generating empathy and affection.