Food matters

Having breakfast with my brother and his family this morning on the Central Coast, talk turned to when food could be considered "spoiled". I have this thing about (a) not eating food that has been on the floor and (b) not keeping food too long in the fridge (all right, I actually balk about eating food that has been in the fridge for more than 3 days - although that's not a problem with the freezer). Of course, not everyone is so fussy. Apparently there's something called "the five second rule" - and if you call it when something's been on the floor, it's like the food hasn't been on the floor at all. Hmm. And of course there's the other saying - which was applied to cheese in this instance, but probably has wider applications: "green fur good; black fur bad".