On his way into town, how does Bakha light his cigarette, and what does this incident demonstrate about how his caste status impacts his beliefs about himself?

When Bakha takes out a cigarette, he realizes that he has forgotten to ask for matches where he bought the cigarettes; he does not turn back, though, as he has a feeling that it is best to minimize the amount of time that others have to interact with him, due to his outcaste status. When he asks a Muslim that he sees smoking hookah for a coal to light his cigarette with, the man simply tells him to lean in and light his cigarette from the coals already burning in the hookah. Bakha is surprised that someone would willingly be so close to him, again showing how his caste status makes him view himself as unwelcome and objectionable.