Unfortunately I know someone who owns this particular product, its one of the only things in the world I consider 'juvenile. But I still cant help but laugh at it.
MEh, I'll just make my own. I'll buy a cheaper pun, and insert it into a self made turd. That way, you save money, and get the realistic smell as well. And you can tell people it's just a joke pen, and when they ask to get a closer look......
See, what you do is walk towards somebody with the pen hidden in your hand, act like you're tugging something out of your ass, then yell 'spladow!' while hurling it at them...