Was Mad Magazine a staple in your diet of comics and magazines when you were younger? If so you’ll probably like these:
A Spy vs. Spy Pencil sharpener gag by Bob Clarke.
…and another pencil sharpener gag from the The Mad Student Survival Guide for Those Bored of Education.
The image of Bob Clarke’s Spy vs. Spy comic is from Anthony Snyder, who allowed me to show it in my blog. The sharpener gag is taken from The Mad Student Survival Guide for Those Bored of Education. I believe that the use of these images in this blog post falls under “fair dealing” as described by the UK Copyright service.