Still Wanking

I have punished Mark with one of my nastiest panels in an effort to stop him wanking but I feel that it just has not been sufficient to drive home the message. We have a discussion and I tell him that as he came to me for therapy I can’t allow him to leave with his craving still as strong as ever. I do believe in aversion therapy backed up by extreme pain and that is just what I inflict on his bare bottom with a heavy senior cane