I'd stop the flicking as it obviously isn't working. If he doesn't redirect to a toy, try holding his mouth shut. Say NO BITES and hold it until he gives a little whine.
Otto as a pup couldn't resist pant legs and socks. Even if they weren't moving. As an adult, I still catch him once in a while in my daughters room shaking her stuffed animals. He doesn't rip them, just gets them covered in spit.
Venus of Crooked Creek 1/26/13
Otto von Hena-C 05/23/08
Morgan Donnermond 08/04/01 to 9/28/12 Long Live the Queen!
I have duct tape and I am not afraid to use it.