The Talking TP ($10) will do.
Hostesses can record anything they want on the toilet roll holder and as soon as the cylinder starts cranking, her voice will be heard. Perhaps I'm immature enough to think it's actually a bit intriguing and could probably play some decent pranks on my close friends, but I keep hearing my mom's voice warning me about the no-nos of potty talk. My guess is that she (and many others) may not appreciate the humor in it. How about you?