Today I found out why.
The chore at the moment is to renovate a run-down shed-come-greenhouse that sits on the side of my house. So far, it has taken me over a week and I've hardly started. So I was going to paint the windows (inside if it rained). Did I? Forget it

Well first I had to pull the kitchen apart so that the plumber can fix a leak tomorrow. When I pulled out the fridge and the cooker, the floor under them was disgusting so I had to wash the kitchen floor.
Then I remembered that my main water butt had a leak so I thought I would fix that quickly. When I moved the water butt it was full of stale, dirty water so I cleaned it out. Then I discovered that the drain pipe feeding it was blocked so I cleared that. The butt feeds from the conservatory roof which was disgustingly filthy and I thought it was a shame to fill a nice clean water butt off a dirty roof so I cleaned the conservatory roof. When I was cleaning the roof, the outside tap started leaking so I had to fix that.
Then the OH appeared. He is moving house and was chucking out a perfectly good wardrobe, sofa and a dustbin full of compost material. I had persuaded him to bring all those things my way (they might come in useful one day). So I then had to find a home for all the goodies and empty out the compost. The sofa is being freecycled and there has been a flurry of e-mails about it.
By this time I was cold and soaking wet and needed to warm up in the shower. After the shower I was far too clean to start painting windows.
Maybe tomorrow!