I got a shelter-rescue cat (Sam) who was about 8 weeks at the time, he's now about 7-8 months and he is obsessive with sucking his own arm. you can't even pet him without the sucking starting, he does in -- it's really gross and it's to the point where it's almost all the time. i tried that "Bitter Yuck" spray stuff and he licks right though it and continues sucking, and we've also tried to simply distract him, but the minute you pet him he goes right back to the arm-sucking. it's soooo gross and my family doesn't even want to give the cat any attention whatsoever because he goes right to sucking his arm if you as much as touch him. what can i do to stop him? please help!