We have a cat, named her Chewey. We had her since she was born. Whenever I would hold her, she would chew/suck on my shirt, nightgown or whatever I was wearing. Vet asked what her name was and dh told her. She asked why we named her that, dh said because she would always chew on whatever I was wearing. Vet told dh that she was taken away from her mother too soon. Dh told the vet that we still had the mother and none of the other kitties did it. She still does it, and she is 4 years old.