What was meant to be a funny dare turned into an utter embarrassment for an American exchange student, who found himself trapped in a giant stone vagina in Germany.

Firefighters had to be called in to deliver the man, head-first, to safety after his feet became trapped in the large marble sculpture at Tubingen University in Germany.

Rescuers works to free the young man trapped in a sculpture of a vulva at Tubingen, Germany. Credit:Imgur

The unnamed man is believed to have been dared to climb inside the sculpture, which sits outside the university's institute for microbiology and virology.

But his legs soon became wedged in the carving and, despite labouring to free himself, the experts had to be summoned.