Matching socks

This morning I let my extremely low functioning client with severe paranoid schizophrenia into the storage closet to pick out clean clothes to change into after showering.
As always, she ceremoniously opened each drawer one at a time, methodically riffled through each in turn, and closed them. By the end she has a collection or garments that you're not sure how she's going to formulate an outfit (yet she always manages to come out fully dressed).
Then she goes to the sock drawer, where all the socks are singles. She stares pensively at the socks for several moments and then picks a sock out. She then will very slowly pick up other socks and hold the two together, seemingly to carefully consider the combination, discarding the second sock into the drawer until she has found a combination that suits her - albeit not usually matching.