'He Who Must Not Be Named' AKA Piggy Hilton Stuck A Finger Up A Howard Stern Associate's Asshole

One of the stars of the Howard Stern show became a human finger puppet today -- when Benjy Bronk got a live prostate exam on-the-air ... courtesy of special guest proctologist Perez Hilton.

As we previously reported, Benjy agreed to the "exam" as part of a weight-loss challenge he made with Howard -- Benjy had to lose 37 pounds ... or else his ass becomes a finger warmer.

Benjy ... knowing it was a lost cause ... threw in the towel this morning -- and accepted the consequences of his bet during a live bit with Perez.

The two traveled to a nearby hotel to carry out the deed ... with Benjy screaming his lungs out the entire time.

In related news, Benjy would not do well in prison.

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