London, Oct 28 (ANI): A Brit man who allegedly groped a woman told jury at Chelmsford Crown Court that he suffered from a rare medical condition called "sexsomnia".
Darren Greenwood, 33, insisted he must have touched the girl while asleep and could not remember doing it, reports the Sun.
Backing his bizarre defence, Medical witness Professor Matthew Walker said: "It was a good example of sexsomnia - no knowledge or control of his actions.
"It fulfils the criteria completely. It mostly occurs between partners and with a person in bed," Matthew said.
Greenwood had only just met the 21-year-old girl, one of a group who went to his home in Loughton, Essex, after a night out.
She claimed she woke to find him lying by her and committing a sex act on her.
Prosecutor Richard Potts said the girl had been asleep and could not have consented.
Window fitter Greenwood, now living in Bethnal Green, East London, denies sexual assault.
He said he let the girl sleep in his bed and she allowed him to get in with her.
But he did not wake until 11am and was "oblivious to anything that happened".
The jury heard he had "parasomnia" which involved punching a wall in his sleep. (ANI)