Answer:
Sociology is the study of the behaviors of the society that one is living in. If a person starts to study their society in detail and starts observing keenly, he would notice several behaviors that that immoral or unethical, yet they are prevailing without any concerns. On the other other hand, their are also some norms that are completely moral and sensitive to human nature.
Every society has their own sets of behaviors and any outsider will feel like e new person if he enters a different social circle because of the different value each society entails.
Exchanging social circles can enhance a persons exposure and vision and he can broadly decide the right from wrong and distinguish between several underlying factors of problems prevailing in a society.
The feelings of Tony that he is experiencing exemplifies the principle of norm of reciprocity. This is the principle where a person would feel that he or she needs to return a favor after the person whom she or he has favors with. Tony likely feels that he needs to return the favor to Martin because Martin had disclosed something personal to him in which Tony expects that he should do too.