The Director of a software company proudly announced that a flight software developed by the company was installed in an airplane and the airlines was offering free first flights to the members of the company. “Who are interested?” the Director asked. Nobody came forward. Finally, one person volunteered. The brave Software Tester stated, ‘I will do it. I know that the airplane will not be able to take off.’
Question: How many testers does it take to change a light bulb?
Answer: None. Testers do not fix problems; they just find them.
Question: How many programmers does it take to change a light bulb?
Answer1: What’s the problem? The bulb at my desk works fine!
Answer2: None. That’s a hardware problem.
I found the Dilbert character Bob Bastard the malevolent test manager quite funny. I tried to find a comic with him but it seems he was only in a video. There was a whole episode about testing. Maybe you'll find something funny in there.