He also elaborated on the infamous blood vials the two used to wear around their necks, revealing the "romantic" thought behind the necklaces.
"Vial of blood is very simple," Thornton explained. "You know those lockets you buy that are clear and you put a picture of your grannie in and wear it around your neck? She bought two of those. We were apart a lot because she's off making Tomb Raider and I'm making Monster's Ball. She thought it would be interesting and romantic if we took a little razorblade and sliced our fingers, smeared a little blood on these lockets and you wear it around your neck just like you wear your son or daughter's baby hair in one. Same thing."
According to the Bad Santa actor, media reports on their relationship were greatly exaggerated.
"From that, we were wearing quart jars of blood around our necks," he said. "And we were vampires and we lived in a dungeon."
The dungeon they were referring to, he further explained, was actually his basement recording studio.