Game of Thrones [Season 3, Episode 2]

— Isn't he ashamed, your brother, needing you to protect him?
— Where's the shame in that?
— Any boy his age who needs his sister to protect him is gonna find himself needing lots of protecting.
— Some people will always need help. That doesn't mean they're not worth helping.

But once the cow's been milked, there's no squirting the cream back up her udders.