RE: PISS ON IT?
I've been telling this story for years on here... I've read the same study Rob cited above, and have years and years of experience peeing in the woods out of multiple sets and have enough record-book bucks on the wall to laugh off the "urine-bottle theory" as nothing more than a fallacy.
I actually crack up these days any time I hear someone relate about how much trouble they've went through to bottle their own urine on a hunt... [8D]