I got up. I showered. I got dressed. I dumped books and things into my bag. I did my face. I grabbed my keys. I got in the car. I drove to the station. I parked the car. I walked to the platform. My feet got a little tired because I was wearing heels, so I sat down on a bench. I looked down to admire my shoes.

Behold.

One blue sock. One black sock.

Why didn't I notice that before I left the house?