Shio and the Bath Mat

I read somewhere that sometimes dogs rub themselves on things (e.g. grass) because there is a scent that they like, and they want to cover themselves in that scent. Shio apparently really likes the scent of our bath mat, because when we allow him into the bathroom (which is not often) he will go nuts rubbing himself all over the bath mat.

Shio Rubbing Himself on Bath Mat

Stranger things have happened, I guess...