Candy is both conscientious and takes pride in his work. He tries to avoid trouble whenever he can.
When George finds the can of pesticide in his new bed’s shelf, he is concerned.
"Says 'positively kills lice, roaches and other scourges.' What the hell kind of bed you giving us, anyways. We don't want no pants rabbits." (ch 2, p. 9)
Candy is offended. He does not want George to think that they are unclean. It is a matter of personal pride for him that the man who used the bed before was extra clean, and that’s why he took the unnecessary precaution of the pesticide.
"This here blacksmith- name of Whitey- was the kind of guy that would put that stuff around even if there wasn't no bugs- just to make sure, see? (ch 2, p. 9)
Candy does carefully consider the can before coming up with this answer. Candy is a conscientious man. He wants people around him to be happy. He does not want to cause trouble.