Apparently the Hamster thing is actually known as Gerbilling where a cardboard tube is inserted into the anus so that a small rodent can be inserted although it does appear to be an Urban Myth, who'd have thought

Origins and Myths
The Legend: The story usually claims a person inserts a small animal like a gerbil, mouse, or hamster into the rectum using a cardboard tube.
Celebrity Rumors: Since the 1980s, the rumor has been falsely attached to various public figures, most famously actor Richard Gere.
Medical Reality: Folklorists and researchers have found no authentic hospital records, emergency room logs, or first hand medical accounts of patients requiring treatment for a live rodent stuck in the rectum.
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