Scissors (R?)

I don't know if this is a repeat but all the stations are up to it, this time of year; sorry if it is, but I was thinking about it just now. When we were little, McMum and McDad went away on holiday for two weeks leaving us with Granny. For some reason, they gave us each a little pair of scissors, with strict instructions that we weren't to cut each others hair. We had to promise. Imagine our cat's delight when we pruned off not only both sets of magnificent whiskers, but also random lumps of fur from her pelt!
Granny was not so pleased.