I've only been driving since April and it's taken me to yesterday to realise that it's the cause of premature aging on the left foot of a few lovely pairs of shoes. Kate Spade glitter Keds and some nice new leather sock boots from Topshop. The toe box is significantly more creased than on the right shoe. 
Is there something amiss with my foot position on the clutch or do I need to start keeping some crappy shoes in the car for driving?