"I told you, I'm the King of Alright. Literally. Little island on the planet of Leymuta, made me their king. Of course, I didn't realize at the time there was a ritual sacrifice involved. Very rude, actually, if you think about it."
The Doctor didn't press Leto. He could have, but whatever it was seemed sensitive and the Time Lord had other priorities. It was a bit cynical perhaps, even for him but his mind was elsewhere.