Benvolio and Mercutio (another one of Romeo's friends) are waiting on the street later that day when Tybalt arrives. Tybalt demands to know where Romeo is so that he can challenge him to a duel, in order to punish him for sneaking into the party. Mercutio is eloquently vague, but Romeo happens to arrive in the middle of the verbal sparring. Tybalt challenges him, but Romeo passively resists fighting, at which point Mercutio jumps in and draws his sword on Tybalt. Romeo tries to block the two men, but Tybalt cuts Mercutio and runs away, only to return after he hears that Mercutio has died. Angry over his friend's death, Romeo fights with Tybalt and kills him. Then, he decides to flee. When Prince Escalus arrives at the murder scene, he banishes Romeo from Verona forever.
Romeo and Juliet's quick attraction to one other must be viewed through the lens of their youth. Even when Romeo is lusting after Rosaline, he is more interested in her sexuality than her personality, and he is upset to learn that she has chosen a life of chastity. Romeo feels sparks of desire for Juliet before they even speak, reinforcing the young man's quick passions. Shakespeare further underscores Romeo's sexual motivation by associating his and Juliet's love with darkness. For example, Romeo compares Juliet to "a rich jewel in an Ethiope's ear" when he first sees her (). The darkness is central to their love, as they can only be together when the day is over. Throughout the play, Shakespeare associates daytime with disorder – not only does the Act I street fight occur in the daytime, but Romeo also kills Tybalt during the day – while order appears within the secrecy afforded by nighttime.