What a pleasant surprise among the defensive takes. Thank you for sharing it.
The most problematic situation seems to be when not having access to all of them and trying to push your partner into fulfilling all of these roles. To be your partner, parent and a friend(sometimes a therapist even). Sure it's nice of them if they can, but it shouldn't be their daily responsibility.
Let me make it negative for you
You could view least amount as something with portion subtracted compared to "normal" amount. Subtraction could be viewed as addition of negative value. So there, it's negative in its core.
Sorry, I though a little too hard about it and had to share