Good ass punishment :
Give him strong enema than a long didlo or tale up his ass. Than he should put on only one peace of clothing like a skirt or other long dress that will cover his bottom but let the dildo inside. Then send him do some shopping I'm a huge shopping centre with a lot of people. After 15-20 minutes he should remove the object from his ass and continue to go around for another 20 minutes. Of course he is not allowed to use the toilet. He should be by now dancing from pain and eagerness to empty his load. When master decide he had enough, he has to buy a pamper for himself, put it on in the shop, go out on the street and then his allowed to empty his load in the pamper while walking on the street.