One sock wonder

I don't have an explanation for this particularly, but would like to merely note a strange but insistent trend: for the past month or so Connor seems to constantly want to have one sock on. Whenever we are home, after about 20 minutes he ends up with one sock on. I think it switches which foot it's on, but there is no question this is somehow the desired state. I wonder if there is some personality trait signified by this. Any thoughts/explanations are welcome.