What is Judge Taylor’s “one interesting habit”?

From the text:

“Judge Taylor had one interesting habit. He permitted smoking in his courtroom but did not himself indulge: sometimes, if one was lucky, one had the privilege of watching him put a long dry cigar into his mouth and munch it slowly up. Bit by bit the dead cigar would disappear, to reappear some hours later as a flat slick mess, its essence extracted and mingling with Judge Taylor’s digestive juices. I once asked Atticus how Mrs. Taylor stood to kiss him, but Atticus said they didn’t kiss much.”