Thanks, Sadie. I wanted to create a Sim version of the Good versus Evil struggle, and it involved a fair bit of preparation - modifications to Sunset Valley, importing Evil Sims from other towns (towns I rarely play in, so I had to first find out who those Evil ones were), and I also created quite a few characters, some based on historical real or fictional villains. Also had to evict all the Good Sims from town except for two, and I was surprised how many Good Sims there were in town. Maybe that's why it's always been my favourite town.
And the explanation for the shower issue is coming up in the second part of Mr Payne's letter. I'm not trying to make people wait, it's just that the letter is long, with a lot of text and not much in the way of pictures, so I thought it would be easier to read if I divided it in two.
My imagination's providing all sorts of awful explanations for those showers.
I suspect the answer will be very obvious when Mr Payne reveals it in the next update. I'll be interested to see how many people guessed it. And if you have guessed it - thank you for not revealing it prematurely!