How does John Kennedy Toole use imagery in A Confederacy of Dunces?

Example of Imagery:

"'It used to be the old Kiwanis types liked to come in and watch a cute girl shake it a little. Now it's gotta be with some kinda animal. You know what's wrong with people today? They're sick. It's hard for a person to earn an honest buck.' Lana lit a cigarette and matched Jones cloud for cloud. 'Okay. We audition the bird. It's probably safer for you to be on my stage with a bird than on my stools with a cop. Bring in the goddam bird."