I just managed to cut the inside of my nostril shaving.
No. I don't know how I managed to do that. If I were you I'd stop asking so many questions that might get me killed.

That's the first time I've cut myself shaving for years. I think the last time I managed to cut myself was in grade 10 - I was shaving my face and felt an itch, which I scratched by moving the razor in a side-to-side manner on my face.

Big mistake.