Look, we’re trying to give you a hint. When are you going to beat it?
Ha Ha. 
Several months ago the end of the plastic cling wrap got pulled back into the box so I had to open up the box to fish it out and rethread it through the opening. I pulled the roll out to find the end of the plastic and a key dropped out. I’ve never seen this key in my life and it’s not recognizable as fitting a car, a house, a padlock, file cabinet, or other common key. I’ve asked family and friends if they’ve ever lost a key at my house and no one has, plus it’s been ages since visitors have been to the house due to the pandemic. I have to guess that it somehow ended up in there accidentally during the manufacturing process.
I seem to remember @lieu once posting about a somewhat similar experience, except it wasn’t pee, and apparently he really offended the deer.
Mops on the roof, we don’t have (I think). We do periodically wind up with gardening supplies on the edge of our backyard.
It’s a postage-stamp-sized lot, with as many detached houses as the builders could manage to put. Our bit has a raised bed at the back delimited by a stacked-stone wall that’s about a foot or so high. The neighbor’s yard is fully planked over with decking, with a raised bed in the very back that is walled off by railroad ties.
People who work on the garden at that house tend to sit on the edge of our stone wall (mmmmm, ok) while eating lunch and having a smoke (not OK)… and have several times left supplies. A large bag of mulch was there for quite some time - as in, well over a year, during which time the house was sold. I kept hoping they would realize it was theirs and take it and use it.
Twice now, though, they’ve left metal landscaping fencing, several pieces. A bit like this..
The mulch, I could see confusion. Hell, maybe it was our gardening service (though I doubt it).
But the fencing?? Not something you leave lying about by accident. Not anything we have anywhere in our yard, either, so there’s no question that it was not ours.
And not twice.
Both times, we’ve left it there for months, and ultimately had to put it out with the garbage. Next time it’s going by the owner’s front door.