I did hear a joke at conference which will illustrate my point:
What's brown and sticky?
This works because we don't think of a stick as gooey, but of course, it is stick-like. Our brain has to readjust because we end up somewhere we weren't expecting. :) The surprise is key. For example, What's white and frosty? Frost. isn't as funny because it's not as surprising.
Humor is very subjective. For example, our Editor's Corner story "The Dog that Broke the Camel's Back" was humorous to some, and annoying to some. Although, hopefully more the former than the latter.
So, I guess my point is, we enjoy humor here at ElectricSpec. Give it a try, but be careful. Good luck!