I looked it up and its a fetish some people have... Heonjae also likes to lick blood and apparently cut flesh (to eat I wonder...). Yeah, I would rather serve my ass to Jingi and do his bidding like a good boy any day of the week.
Suddenly a lot of dots are being connected, like how Heonjae came twice on Myenggi's Injured face, The way he held and runbed his face while describing what Jingi was gonna do to him. If that came from a real life person we'd all be running so fast.
well that explains a LOT ☠
why is he licking up his vomit gang…