Mathematics is the art of giving the same name to different things. — J. H. Poincare
An engineer thinks that his equations are an approximation to reality. A physicist thinks reality is an approximation to his equations. A mathematician doesn’t care.
While math humor is not funny for everyone, it can help one’s understanding of broad mathematical ideas by playing on ways in which mathematicians think, operate, and interact with other academics. Here are a few sites hosting collections of math, science, and engineering humor.