It happened again yesterday.
I don't know why, but when I tell people I support Celtic, they feel honour bound to ask whether I'm a Catholic, regardless of their own religious affiliation.
I always answer honestly that no, I'm an atheist.
It's always fun watching them struggle to frame the question, "Yes, but are you a Catholic atheist or a Protestant atheist?"
The Scots are deeply bizarre. I'm just going to start telling them that I'm a Zoroastrian, it'll end the conversation more quickly.