How Long Do You Wait To Wear New Clothes?

I have this friend, let's call her M, for whom new clothes are sacred. So sacred in fact she's compelled to wait several days, if not weeks, before wearing them. I think this has to do with prolonging the shopping high. Or maybe it's about deferring the pleasure that comes with wearing a brand new outfit. It's pretty alien behavior to me either way.

I'm the person who might even walk out of the store wearing whatever I've just bought, or will come home and immediately put on a new garment just to waltz around the house (part of my gripe about having rubber soles put on a new pair of shoes is that it gets in the way of my instant gratification). But maybe waiting-before-wearing is a more common phenomena than I'd have thought. I'm curious: anyone out there with my friend M, or are you guys as impatient as I am?