Regenerating into a new body was always something of a lottery; each body was different, and came with its own unique set of physicals skills. For instance, his second body could play the recorder, his third knew martial arts, his fifth was good at cricket, and his Eleventh excelled at football. It was always fun discovering previously unknown talents.
The problem came not from discovering the new skills he’d gained, but finding out at the worst possible moment which ones he’d somehow lost along the way.
“I don’t think this body knows how to swim yet!”