<human>: Can you summarize the given text in a few sentences?

So, I'm at my wit's end stressing about this (not that stressing makes a difference - but hey) It's new years eve 2010. I drop off a North Face coat into my mate's room in the house where a party is going on. Knowing almost all of the attendees at this party, I don't think to check on it, except when I need to use a glucometer that's stored in the coat pocket. Party goes on, I eventually wake up on the couch the following morning, to find that my coat, along with my glucometer (important if you're a diabetic, and pricey to replace) has been nicked. Almost €400 worth of my stuff gone, because some inconsiderate ass was cold.
<bot>: Some asshat took my coat on NYE along with a pricey bit of medical equipment. How does the thinking of people like this work, even if they find (and know) what the glucometer might be?