Could you elaborate "corny things" please?

Hi. If someone always says or asks you about corny things, what do you say to him? I am not really sure what sorts of things you are talking about. If what he says makes you feel uncomfortable, then just say: "Sure, whatever", in a sarcastic voice and start talking about something else. If the person just makes silly comments, you can say: "Yeah, right," in a bored tone and change the topic of conversation.