My 3 year old and 6year old boys share a room. I noticed a smell of pee last week and thought my 3 year old had perhaps wet th bed so changed it but I could still smell pee so bought all new bedding new quilts and pillows but still the smell stayed. Then I seen my 3year old go into his room and pee!!! I was mortified and asked what he was doing!!! He told me his brother does this and says it's ok. I explained this is not ok what so ever!! So when my 6 year old got home from school I asked him and he has admitted peeing on the walls, on the beds, on the floor, just where ever!! I asked why on earth!!!!???? He couldn't give me an answer. I don't know what to do!! Why would he do this?