his tone is deterministic in the way that he labels Romeo as a 'lover' which sounds rather cynical, as though people are set and have no freewill to be something else
Cupid was actually blind in Roman mythology, making the arrows of love that he shoots random and ruled by chance which is a pessimistic view of something traditionally romantic
"Borrow" also diminishes cupids power, as though anyone might "borrow Cupid's wings" - can deduce from Mercutio's language that he is pessimistic about love.
"madman, passion, lover!' - Act 2 - love
His grouping of these words makes them sound as though they are semantics
speaks as though "madman" and "lover" are synonymous - he is mocking Romeo and shows his distaste for love
"prick love for pricking" - Act 1 - duality
Mercutio is a loyal friend who jests a lot but also has moments where he is serious - malevolent
His repetition of "prick" reminds us that while he is giving advice to Romeo, he is also using violent language to convey a deeper, more serious point - love can be violent as well as idyllic
'raise a spirit in his mistress' circle' - Act 2 - duality
His language boarders offensive now - melted from comical, into offensive
Mercutio always seems to ride the line between being humorous and being serious, such is his dichotomy
Perhaps, Shakespeare uses him to demonstrate that humans are complex and contain multitudes and often people are not what they seem
"A plague o'both/ your houses" - Act 3 - violence
his death represents his impulsivity and Shakespeare uses this quality to demonstrate the consequences of the folly of youth, that being haste can lead to death as such in Romeo and Juliet's case
Romeo and Juliet - hasty and that quality ultimate leads them to their death as well
Mercutio thinks love is superficial
he personifies the chauvinistic male view of the era
Romeo juxtaposes this in his tenderness, yet his ceaselessobjectification and oppression of women in his speech shows that he is the epitome of an egotistical man of the patriarchy
reduces Rosaline to her "foot", her "straight leg", her "quivering tights"
attempts to lure Romeo out by speaking of Rosaline in a a bawdy and objectifying way by listing only the parts of her body that might be considered sexual
Mercutio is pessimistic and cynical about love, and he mocks Romeo for feeling the emotion so deeply. In this way he is a foil to Romeo
Mercutio is a complex character who provides comic relief, but often his comedy has serious undertones, and his lines go from humorous to sobering rapidly.
Mercutio is punished for his impulsive nature and Shakespeare uses his death to demonstrat he folly of youth, which is their impetuosity (hastiness / impulsivity