I think this is kinda popular around everywhere in kandy. Few days back, around where I live, few guys got caught making fun of their neighbors acting like grease yakku lol, and these guys were also the same ones who were hunting for grease yaka. And the thing is no one exactly came across one, it's always someone's someone came across a yaka or whatever. No reliable source to confirm. So, all the perverts are getting caught and having a bad time these days thanks to this grease myth