Started potty training my 2.5 year old son last Monday (6 days ago). Just took off his nappy and kept him naked from the waist down. He is happy to wee and poo on his potty and does so on his own initiative. However, whenever I put anything on his lower half be it pants or shorts he just sits on the potty and performs through them. Any suggestions please as I'd like to be able to leave the house in the not too distant future!!!