Because there has been a birdtable in it. And as everyone knows, all gardencentres smell of a gerbil.

Consequently, all my instruments smell of a gerbil, my hair smells of a gerbil, my clothes smell of a gerbil and my bag smells of a gerbil. And other people say when they either get in my car or go near me: "(sniff, sniff) What's that smell of gerbil? (sniff, sniff)"