I'm attracted to girls using the toilet, so naturally I've been recording girls pooping for years (mostly at home.. I was able to record lots of audio of my sister taking fat dumps before she moved out with her bf)
Alas, I'm too pussy to actually sneak a phone or a camera in the bathroom though, so I go to the basement and place my phone underneath the drain pipe, and listen to the plop sounds as I jerk off.
When I'm at work, I kill time in the bathroom by putting my phone up to the wall whilst trying to capture women using the shitter next door, but typically the toilets are too far away to pick up anything. All I'll hear as an occasional cough, or a nose being blown. I actually heard a chick fart once, but I wasn't recording unfortunately. I bet the store manager probably has an aerial-view camera hidden in the ceiling of the women's bathroom; hell, maybe there's one in the guys shitter. That'd be pretty funny if he saw me try to take voyeur vids with a crappy smartphone, as he records with his pro setup going "fuckin amateur"