Romeo, Mercutio, and BenvolioSomewhere on the Streets of Verona
The ape is dead, and I must conjure him... (Line 19)
An if he hear thee, thou wilt anger him. (Line 25)
Mercutio is talking to Benvolio about Romeo and making fun of him. (Over-Insulting)
He jests at scars that have never felt a wound. (Line 1)
The idea that people can say whatever they think is right is also closely related to why there is a lot of fighting and argument going on in Verona. People don't know what offends people, because everyone is so crude.
This relates to the motif of Conflict, because it is caused by argument and fighting in the first place. If people were just a tiny bit more considerate of other people's feeling, half of the everyday squabbles would not be a problem.
Shakespeare is demonstrating how ignoring what people say sometimes can be a big help through Romeo, when he keeps his cool, to Benvolio's surprise.