All the fun of the fair

I was standing on a street corner with my sister on Saturday (waiting for a friend—we're not prostitutes), when I saw a man holding what looked like a goldfish in a bag. “Aw,” I thought, “how lovely, he must've won that at a fair somewhere. I wonder where, perhaps we could go...” (I had a bit of a hangover so my thoughts were rambling). Just as I was pointing it out to my sister, he got a bit nearer and I realised that it was a colostomy bag. Lovely.