The rectum, redux

I've just finished Papillon, which described a reasonable amount of fiddling around in one's rectum for one's money cache. Now reading The Thousand Autumns of Jacob de Zoet, where in under 100 pages the protagonist has first been advised that if he wishes to smuggle, he ought to put his goods up his "fig," and then has been used for an unwilling demonstration of a glister (i.e., clyster) technique.

The return of accoucheur

And again in Robert Charles Wilson's Julian Comstock: A Story of 21st Century America.