Post a funny dialogue from a movie, show or even make up your own, whatever. Here´s my favourite:
(Barney and Lilly, from How I met your mother)
L: There´s a big sale tomorrow at the wedding shop? Barney, will you go with me?
B: Im sorry, I cant. I got this thing.
L: What thing?
B: A penis.
damn, I laughed my ass out at that one...