In America there are many different groups of "Adults." These can be broken down into distinct categories, each with their own unique features.
Here is how I see them:
3. Parents with 2 kids: These are the justice scale parents. They either have 1 kid for each hand, or divide the kids up equally between the parents. Extra lucky are the parents that get one kid of each sex. Then they can divide by gender and everyone is happy! It is still somewhat feasible to ask a family member to watch them so you and your partner can have some alone time...just don't do it too often, as that leads to: