Having It Handy
Preparing for any situation appears to be a significant concern and source of contention for most people. Many may need to learn that simple hacks help prepare for such scenarios anytime and anywhere. For example, pens allow for taking notes, giving numbers, or even drawing exciting things.
When such cases occur, it can be awkward without a pen around unless you borrow from this man, that is, if possible. Many people stick a pen to their ears, but this is a startlingly accurate pen tattoo. Perhaps the artist referred to their geometry notes for precision. This man genuinely made the pen handy.