It certainly does explain a lot, doesn’t it?
Or maybe Germans use “felt” for TP…
Personally I think that “Unterwelt” (for staging) would be even more poignant since it translates as “netherworld” but can also be the criminal milieu. You gotta play those things for all their worth! Trust me! 
PS Where do I get those wacky ideas? Been reading NA model railway publications for too long! 38 years and counting!