Billy Bob Thornton has confessed that his the marriage to his ex-wife Angelina Jolie was filled with feelings of insecurity.

Married for three years from 2000 to 2003, the two actors were too different for the marriage to work, Thornton has revealed. Jolie liked to socialize in Hollywood while Thornton preferred to stay at home.

Thornton also explains one of the crazier stories from their marriage. “The vial of blood [story] is very simple,” Thornton told GQ. “You know those lockets you buy that are clear and you put a picture of your granny in and wear it around your neck? [Jolie] bought two of those. We were apart a lot because she’s off making Tomb Raider and I’m making Monster’s Ball [and] she thought it would be interesting and romantic if we took a little razor blade 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.”

Thornton stars in Bad Santa 2, coming out Nov. 23.