IIRC, this design predates 1945, and is not specifically about parasites but digestive health in general. (There were a lot of health fads in late 19th/early 20th-century Germany, some more quackish than others.)
In a way, this is a tribute to longevity of bathroom porcelain. Even in Germany, this is far from modern. If you look e.g. into the bathroom department of German DIY stores, you won’t find this design anymore.
IIRC, this design predates 1945, and is not specifically about parasites but digestive health in general. (There were a lot of health fads in late 19th/early 20th-century Germany, some more quackish than others.)
This may be an obscure fact, but World War 2 was not the first time that Germany was ravaged by war.
In a way, this is a tribute to longevity of bathroom porcelain. Even in Germany, this is far from modern. If you look e.g. into the bathroom department of German DIY stores, you won’t find this design anymore.