Dear amused,
there is something called an anal tampon. Seems not to be available in the United States. The only link I could find is in Germanhttp://www.mein.coloplast.de/produkte/inkontinenzversorgung/analtampon/pages/analtampon.aspx
Although Coloplast distributes in the States. However, I think if you write to
[email protected]someone there will be able to answer you in English.
If not. Drop me a post here and I'll write to them for you.