Jeez… a usability analysis of toilet-roll holders by Don Norman. What’s even sadder that this is (a) the fact that I performed my own toilet usability analysis a while back, or (b) the fact that when recently confronted with a similar double toilet-roll holder to the one described, I went through all the analysis described in Norman’s essay before choosing the toilet roll (seriously!) and ended up feeling guilty for taking it from the bigger roll (which was easier than taking from the little roll and having it snag on the big roll) because I knew that sooner or later some poor sod was going to end up with a double toilet-roll holder but no toilet roll left. Ah well, perhaps there’s hope for me as a usability expert after all. And if not, I can always get a job in the lavatory trade.