When you write, you have to have some kind of writing utensil, whether it be pencil, pen, or word processor. But they don't have to be boring writing utensils.
For example, I have a quill pen. It's not a real quill that you have to dip in ink and all (but I actually do have one of those, too). It's basically just a ballpoint pen stuck in a feather. But it's cool! It's great for when I'm feeling more Shakespearean or like less of a Muggle than usual. I bought this pen in England a few years ago. Unless I'm much mistaken, it came from a gift shop in Stratford-upon-Avon. So it's legit.
I mean, as legit as a fake quill can get.