Obviously you have not watched QI like many of the damn people I know, it seems every time I eat a biscuit somebody wants to tell me the fascinating story about how biscuits go soft when stale and cakes go hard. This is how Jaffa proved that they make cakes and saved money on tax or something... It really is highly interesting. Oh how I love it when people explain this to me, it makes me all tingly and happy inside.