Bless my little boy. I was just walking across the landing from one room to another, when I noticed he was having a wee. I stopped so I didn't disturb him. Whilst he was having the biggest wee ever a little fly landed on the outside of his poo box. When he finished he just stopped and froze (in his box, facing towards the back) then all of an sudden lept out, chased, caught and ate the fly. So yup, he doesn't cover wees - he's too busy.