Abad was fitted with the £70,000 replacement in 2012 after he lost his penis and testicle when he was run over by a car at age six.
The security guard had his latest operation, the 121st, last weekend at University College London, where surgeons spent three and a half hours reducing the penis.
They also harvested sperm from his remaining testicle, in the hopes of one day fulfilling his dreams of becoming a father.
Mr Abad said he is now waiting for the stitches to be removed, and is taking antibiotics to prevent any potential infections. he said he's also looking forward to using the smaller penis that he has.
'I can't wait to try it out,' he told The Sun. I'm looking forward to "getting the poetry in motion".