Pound Of Mud

At work in a garage and my coworker was working on a very muddy truck. Coworker- I just beat a pound of mud off of this driveshaft. Me- You can beat a pound of mud off of my dick. Coworker- Why the hell is there a pound of mud on your dick? Me- Because I've been fucking your mother!

I laughed hysterically and he hasn't spoken to me since.