Is it normal that i masterbate to the smell of horseradish?

Everyday when I'm driving to work There is this 1 intersection That I get a little "excited over. It is by a fastfood restraunt that gives off the smell of horseradish. The light takes a long time. So i found out that i like the smell of horseradish and i just cant help myself. My hand just goes to the pants. I am wondering if this is normal?