A moron once said, "sarcasm is the lowest form of humour".
Sarcasm usually requires a quick wit, and the ability to extract the minutest points of weakness in a conversation. So it is quite unlikely that it is the lowest form of humor as some would like to call it. Perhaps not being able to enjoy sarcasm is directly related to not having the ability to come up with sarcastic comments, which in turn creates a feeling of inadequacy, which in turn can spawn an inferiority complex, that can cause someone to believe that sarcasm is the humor of the stupid.
