Severn, a couple o' yourn sound promising:

"A Bedpan-orama of 1980's Pop Music"

or how about "BedPan Alley Hits?"

"Cannibalism" - actually I do know a couple songs for that one. ; )

I really do like this idea;   "'Skip To The Loo'"-A History of Restrooms in Folk Music"

But then, we Mudcatters have a whole (long) thread about "farting songs." At least I think we used to. I'm afraid that workshop might be a victim of its own success!