My mum's friend from down the road came up this evening, while I was at a friend's house party.
Anyway, I just got home and my mum was cleaning the settee in the conservatory. I asked her why, and she said that when her friend had gone home, she'd left smears of dog poo all where she'd been sitting.
Now, this friend is a perfectly normal lady, living in a nice house with her husband. She's no lunatic.
Suggestions as to W(hy)TF?