My trainer has a regular job so he is not doing this for the money. Thats why he can simply decide who he wants to have at his training and who he doesn't want to have. And in case it is a fatty my trainer likes to see the fatty sparring with me as he never wants to see the fatty again. Regular newbies would have started with light grappling sparring before even moving on to stand up sparring.  We had some other unusual rules at our gym but it doesn't matter what I am writing here as I have no proof and you decided that you won't believe me.