Have you come across people who are not what they seem to be - like someone who is extremely friendly and helpful yet you are not very comfortable with him /her as you feel it is a put-on? Have a class discussion about such people and why you feel as you do.
Note: This question is to be answered on the basis of your own understanding, experience and thoughts. It is strongly recommended that you prepare the solution on your own. However, some pointers for discussion have been provided for your reference.
Yes, I have come across such persons. They, at first, are and can be successful in impressing others. However, when the real picture is revealed, they are subjected to embarrassment and humiliation. They also lose their popularity and the previously formed impression gets marred.