How the liar in the sketch is funny and deceptive

A, the liar, has a bad look. A says, the boss has another drink (he drinks a big glass). A says, the feeling is deep. He takes a sip (he drinks another big glass). A says, the boss takes a light lick (again) Drink a big glass) A said, I drank a lot of love and vomited blood (I drank another big glass) The boss said, why do we keep talking about relationships? I’m not Brokeback Mountain. B shouted at A, who did you drink? A yelled, I am the one who drank it! The two of them were fighting, and the boss broke up the fight. They were all buddies, so why bother? Okay, stop fighting. After the boss said this, he was beaten up by two people and his wallet was taken away. Liar A said, let's go, buddy, are you still angry with me? Liar B said, you have to forgive me for being young and ignorant. A said, ok, ok, find me when you have time. I took the money and went to B and said, definitely, see you later