How can you convince a person to laugh at a joke that he already knew??

Question

How can you convince a person to laugh at a joke that he already knew??

Answer 1

tickle them right after you say the punch line.

either that or make it a REALLY good joke. :0)

<33

Answer 2

b very attractive & wear a real short dress .

Answer 3

make them forget it with your special powers

Answer 4

Easy point a switchblade at his neck ask him to laugh..

Answer 5

say it in a different voice  

Answer 6

Tell it wrong, or change the punch line.

Answer 7

just put a gun at his head and ask him to laugh!