To nude or not to nude, that is the question — at least for some of Hollywood's hottest stars. For other A-listers, though, taking off their clothes is considered just the same as any other aspect of a role they might take on. It's all about what feels right for the character, say actors like Angelina Jolie and Leonardo DiCaprio, which may be why they're among the actors and actresses who have spent the most time nude onscreen across their careers. That's right: thanks to the fine people of…