I've mentioned before Kevin's aversion to bare- or even socked-feet. When he first came home he'd scream without his shoes on so he even wore them to bed. We tried to get him to wear slippers but it took a lonnnnnng time for that to work out. Once it did, we created a slipper monster. It's hard to find replacement slippers during warm weather when you don't want to spend more than $10 (mail-order surely works but we were hoping not to go that route.) As you can see, the time came when it was necessary to suck it up and hand over the cash.
Kevin ceremoniously slam-dunked the old slippers in the trash after trying on and determining that he loves the new slippers he picked out.