how does crooks taunt lennie?

Crooks is excited at the prospect of having someone to talk to, and the joy of finding someone who does not judge him is even more rewarding. He quickly realises that he can torment Lennie easily and, as he has spent so long being the victim, he relishes the opportunity to taunt Lennie.

Firstly he plants the suggestion that George may not come back from the town, and that he may abandon Lennie -

'I said s'pose George went in to town toniht and you never heard of him no more.' Crooks pressed forward some kind of private victory.'

Then Crooks teases Lennie about what would happen to him if George did leave him-

'They'll take ta to the booby hatch. They'll tie ya up with a collar, like a dog.'

Crooks only stops when he realises that Lennie could be dangerous if angered.