This brings back memories of something I did back when I was a kid.
I used to live in a very rural and remote area of Northern Indiana. Our neighbors had an old two-seater outhouse for those of you old enough to know what an outhouse is. Anyway I had a long length of garden hose and I affixed an old metal funnel to each end of the hose. I ran one end in under the "seating" area and the other end I ran back to a group of bushes where I hid. Then whenever a woman went in, I would wait a minute and then say, "Ma'am would you mind moving over to the other hole? I'm painting under this one." Immediately, a screaming woman would exit hoisting up her drawers. I was a rotten kid!