If a friend cracks a corny joke, do you force yourself to laugh politely? What about if it's your boss or teacher? Do you get annoyed if someone else pretends to be amused?
Corny jokes, eh? When a friend or family member is the culprit, I tend to give a sarcastic laugh that turns into a groan. A teacher or family member? Oh boy, I must admit that I usually chuckle politely as to stay on his/her's good side. :)