Why?

Why does my cat always wait til I get home and am sitting at the desk next to the litter box to use it? Ew.

Also, I know I realize this is now my second post about yogurt in one week, but day-am, Archer Farms(a Target Brand) has amazing fat free yogurt. The consistency is thick, more like that of pudding than yogurt, and it has cool flavors like Black Cherry, Honey Almond, and Blueberry Pomegranite and are $.54 each. (I did not eat the "Bread Pudding" flavor-EW, this was just the only web photo I could find).