Why my cat is a pain in the butt

My cat is ancient-or, should I say very old. We got him when he was very young, and at the time, was decent. Recently, though, we discovered that our cat, Moses, has diabetes. He could lick himself for hours, usually only stopping to eat and drink. And to sleep. He also became more and more thirsty as he grew, and we learned that he would always drink much more than the average cat. His weight was also an issue. You know the rule that you can't expect something to be healthy and thin if you give it too much food and not enough exercise, right? {If you don't know the rule, then don't worry. I just made it up. :) } Anyway, Moses is the exception to that rule. And if you think your cat is fat, don't even start! And so to stop him, we gave him numerous cones so that he couldn't lick-turns out he was a lot smarter than we thought he was. During a month and a 1/2, Moses managed to evade a total of about 7 or 8 cones! So we set the cones aside, and decided to let Moses make his own choices for a while. In a couple of months, we gave Moses a new cone-that was because he had acquired many hot spots on his belly. We also bought bitter apple to rub on his spots so he wouldn't want tro lick them. The point is, as much as I'll always love him, he is absolutely annoying! You want to play with him, he attacks; you want to pat him, he'll bite; you want to pick him up, he'll claw and scratch at you til' you let him go-but that's just Moses!