Curley beat up Lennie in "Of Mice and Men" out of anger and jealousy. Curley was upset over his wife's flirtatious behavior towards the ranch workers, including Lennie. Being a small man, Curley also took out his frustrations on Lennie to assert his dominance and power over him.
Curley was in the bunk room beating up Lennie. Curley was looking for his wife and saw Lennie laughing. Curley thought Lennie was laughing at him when he really wasn't. Curley then started to beat up Lennie while George is screaming to Lennie to fight back. Lennie then grabs Curley's fist as he is about to punch him again, and Lennie crushes Curley's fist. The damage to Curley's fist was so bad he was taken to the hospital. Slim forces Curley to say his hand was crushed by a machine. There were hardly any bones left in Curley's hand, and Curley was crying.
Curley dislikes Lennie because he sees him as a threat or challenge due to his size and strength, which makes Curley feel insecure about his own authority. Additionally, Curley's possessiveness and jealousy of his wife make him suspicious of Lennie and ultimately leads to their confrontation.
George wants Lennie to stay away from Curley and his wife because he knows that Lennie is not able to understand social cues and may inadvertently get into trouble, especially with someone as volatile as Curley. He wants to protect Lennie from dangerous situations and avoid any conflict that could jeopardize their dream of owning a farm.
Curley attacks Lennie out of rage and insecurity. He is a small man who feels threatened by Lennie's size and strength, and he targets Lennie in order to assert his dominance over him and prove his own toughness to the other ranch workers. Curley's aggressive behavior reflects his own feelings of inadequacy and a desire to prove himself.
George tells Lennie to fight back and defend himself if Curley hits him. George wants Lennie to stand up for himself and not allow others to take advantage of him.
Curley thinks that Lennie was laughing at him (when he wasn't) and he has been wanting to pick a fight with Lennie because he dislikes people taller than him because he isn't very tall himself.
He took an arrow to the hand.
George tells Lennie to avoid getting into trouble with Curley, the ranch owner's son, and to stay away from him as much as possible. George warns Lennie to be cautious around Curley because he is known to be aggressive and easily provoked.
Curley's wife visited Crooks, Candy, and Lennie in the book "Of Mice and Men" by John Steinbeck. She went into Crooks' room looking for Curley and ended up talking to the men there, revealing her loneliness and desires.
If you're talking about the book 'of mice and men', they pretty much hate each other;In one scene, Curley beats up Lennie for no real reason, George tells Lennie to fight back, so Lennie does, not meaning to break/seriously injure Curley's hand. After this incident, Curley hates Lennie, (obvious) and hates George for being Lennie's friend, and not being on Lennie's side.Something that doesn't help their relationship, is how protective Curley is over Curley's wife. Curley's wife is very flirtatious, and tries to have conversations with both George and Lennie. Curley hates George for flirting with his wife, even though it wasnt his fault. He is also too strict with his wife, which makes her go looking for even more trouble.Near the end of the novella, Curley's wife tries to talk to Lennie in the barn, but they get into a bit of trouble, by Lennie accidentally killing her. he then runs away, knowing how much trouble he will be in with everybody. When Curley finds out what happened, he automatically blames Lennie without proof, so therefore hates George even more.Hope this helps, and if you watch the film, it should be a bit clearer.
George tells Lennie to stay away from Curley's wife because he knows she may be trouble. He is concerned that Lennie's innocence and lack of understanding of social boundaries could lead to a dangerous situation with her, as she has been flirting with the ranch workers.
When Lennie does not want to talk to Curley's wife she begins to feel like everyone around her wants nothing to do with her including Curley himself. She also does not understand why nobody wants to talk to her so she asks what the problem is with someone trying to get a little attention, as well what the problem is with her trying to make conversation.