That's the discovery that forensic psychiatrist Marty A. Sindhian, M.D., made while researching "Stuck Up!" -- a look at the strange objects that have found their way into the human body through the various orifices. The intentionally funny book includes more than 100 bizarre X-rays, and when you finish, you may never look at Barbie dolls or baby shoes the same way again.

Sindhian, who co-authored the book with fellow shrink Rich E. Dreben and emergency room physician Murdoc Knight, made this discovery while researching a case about a person who came into the emergency room a few years ago and a cassette tape showed up on the X-ray.