Leeches are great. Except when you live near a swamp and they keep getting stuck to you, and interrupting your hunting and whatever else you might be doing....
I was thinking about the possibility of some kind of "wader" style boots (maybe it could cover the shoe slot and one pants slot?). Make it out of a bunch of linen or leather, then duck it with beeswax (10? 20? i'd guess it would have to be a non-trivial amount). Whenever they are equpped, you don't pick up leeches. Maybe you get some other little boost to a stat or skill too.