The cats drop their toy mice into my purse...I find them when I'm at the bank, the grocery. I also "find" Milkbones and other dog treats in my pants pockets, hopefully before I wash them.
Then there's all the odd things I will tuck into my pockets at work...
Yeah, working in a hospital gives lots of opportunity to end up with strange things in your pockets.
When one of my brothers was a little kid, he would put anything he found outside that struck his fancy into his pockets. Rocks, twigs, bugs, bottle caps, rabdom junk. My mom always had to check his pockets before putting his clothes in the wash.
One day we heard her start screaming and yelling all sorts of the things concerning my brother and various threats of punishment. We raced into the basement and she was up on the washing machine pointing at something on the ground and screaming for us to get it out of her house. We looked and there was a red belly snake on top of one of my brothers pairs of pants. They only get 6 to 8 inches long, but my mom has a phobia of snakes and she'd reached into his pocket and pulled it out. We were all surprised the poor little thing was still alive and when we got over our surprise, confusion, and hysterical laughter we took it outside and let it go by the trees.
As for myself, I intentionally keep things in my purse that a lot of people find strange. Mini flashlight, mini-hammer that has screw drivers hidden in the handle, a multi tool, a 10 in 1, retractable network cable, usb key, mini screw drivers (like for glasses, watches and electronics) mini measuring tape, various first aide stuff, emergency sewing kit, and usually a book. And I don't carry a large purse, it's never larger than roughly 10"x8"x4" in terms of dimensions. I don't think I've ever found anything strange in my pockets or purse that I didn't intentionally put there because I thought it would be good to keep it on me.