This has nothing to do with sycophants. I often see people in reel and real life licking their thumbs or forefingers when they flick pages, bills (ewwww) or even envelope adhesives. Personally, I have nothing against them, save for the health implications. I am against it for the following reasons: it is unhygienic and serves as portal of entry for bacteria and parasites; saliva when introduced to exterior environment leaves a foul smell; I was brought up in such a way that my parents told me that it is unhygienic to lick or ingest improperly cooked food, let alone paper or inedible materials. This may be a cultural thing because this is often seen in movies and is acceptable in some cultures. I would like to know if it is a practice in your culture and how people react from the health perspective. Thanks a lot.