Dirtiest joke I’ve heard at work…and I have a terrible sense of humor:
My penis is so polite, it stands up so women have a place to sit down.
Now, had I said this at work I’d have to explain to my wife why I got fired. My workplace is ~60% women so we guys are very careful of what we say and how we say it. I work at an uber conservative company and having a sense of humor, even a clean one, is frowned upon.