Over a period of several years, it finally "dawned" on me that when I peed from high in a tree, that's when deer would suddenly appear most.

For years I'd taken extreme measures to not do such seemingly "stupid" things, as make such a racket, much less all that human pee smell --- yet, sometimes, just had to let it fly. I'd try to wait until surely no deer around, or it's after 10AM --- no deer around --- but while still in mid-stream --- here they come running. Not away from me, but to me. I once picked up a pocket full of white oaks on my way to my stand. I got bored in the stand and started peeling the acorns and flicking them. A 10pt i was chasing suddenly appeared 50yds away. I kept dropping those acorns below my stand and pulled that buck within 15yds when i let the arrow fly and got me a 139" p/y buck. So I know they are sound drawn....

Best deer call in the woods:

The sound of something (most anything) falling from a tree onto dry leaves. I've even dropped a fanny pack, and then had deer running up to investigate. Or have you ever lowered your bow (or gun) down before a climb down, and a few seconds after it hits the ground, you hear deer walking towards you?

Yet to figure out whether the deer have been "conditioned" to thinking it's probably another deer (the pee hitting the ground) or maybe it's something (like acorns) that's falling from a tree (edible). Either way, they are "conditioned" to come check it out when they otherwise don't perceive danger associated with this sound --- pee hitting the ground. And I can almost guarantee you that despite popular myths, deer are not spooked by the smell of human urine --- the sound will attract them, and the smell will NOT spook them.

Ever try to sight down an MZ's barrel with most of a Nutty Buddy sticking out of your mouth?

Nope! But I have sited in with the MZ with my pants down and everything hanging out!

The number 1 time a deer catches me off guard is while I'm peeing. It's happened way too many times. I know I've watched deer come straight to my tree and sniff around. Years ago I found that a pee bottle was just one thing I could eliminate from having to carry in with me. What I do wonder though is in prime setups where I have peed from the treestand if possibly bucks passing through after nightfall may be able to link the smell of urine to any potential human odors left behind and create the man association thus avoiding that immediate area temporarily.