Up to some shoenanigans

Hi, name is Kristen and I'm a shoeaholic.
What's prompting this confession is that I just realized I've purchased four pairs in the past month.
I love shoes. Adore them. And, I have a lot. I haven't actually counted because I don't want to have a number attached. If there's some mystery and no set amount, then perhaps I don't really have a problem.
Over the weekend, I snapped up a pair of these cute Simple peep-toe flats. They were just under $30 (free shipping), and I'd wish-listed them weeks ago. It was a must-buy situation.
So, now here's my dilemma: I'm officially out of space.
Earlier this year, we paid someone to redo the master closet, and while it's still not the one of my dreams (that would probably be Fergie's, which I saw featured in one of my many fashion porn mags), it's quite functional. The lovely Scottish woman who designed it warned me that even with the seemingly endless shoe shelves, she could probably only get 100 pairs into the closet.
In some cases, my shoes — mostly flip flops - are double-stacked. I've had to start an auxiliary shoe stash in the guest closet. There are a fair number of boxes in there. I'm not going to count them up. You can't make me.
So, I don't know what to do. We're out of room, and I can't bear to part with any pairs — I weeded out earlier this year and there's no more riff-raff. It'll be years before the kids move out and I can take over a room.
So as I consider my past month's shoenanigans, my question is, if evolution is true, how come women don't have more feet for more shoes? Hmmmmm?