Rattus Norvegicus.

Druggies are a bit like brown rats, you're never far away from one, one place became a doss house where the local underclass just invited themselves round, at the time I was seeing a girl so anything I had of any value was left at her house, it was a bit much coming home to find we had run out of spoons yet again and even I realised I was maybe getting instutionalised when I came home one day and saw some emaciated stranger casually inhaling what I presume was crack through a beer can as though it was the most natural thing in the world.