When I first heard of it, I thought it was to get the fish stink off, too. But, after doing a little research I found that the purpose is to mask the "human" smell from your hands. I found many sites selling it, and some users swear that the fish are also attracted to it somehow. One of the guys I work with says he sees it in different bait and tackle shops. I made a batch using anise, but it's still on the curing rack.