Lyric discussion by bmwh2t 

Cover art for Suckerpunch lyrics by Envy on the Coast

anyone explain this pls, I don't understand:

"So open up, open up like a Russian doll You're the same You're the same as the next one Don't you dare run I've been doing that for years"

What's Russian doll, "next one", "doing that for years"?

and

"I want black and blues I want black"

What's black and blues after all

And whys he say "Your word, your word, I'll take it to the grave, take it to the grave" ?