Why oil, water, and a little kitchen chemistry explain more about human relationships than you might expect.
Some situations make you notice human dynamics more clearly, for example, when people who do not usually interact are suddenly brought together. Lately, this has made me think of something from science: the ways that things mix, and the ways that they don’t.
Have you ever tried to make your own salad dressing by mixing oil and vinegar, and then watched them stubbornly separate? Then you’ve met an emulsion. And you’ve met a pretty good model for people.

There’s something honest about kitchen chemistry:
It doesn’t moralize.
It just shows what conditions do.
Funny enough, people can behave the same way.
Some people mix right away. Others don’t.
Make a vinaigrette and you’ll see it: oil and vinegar briefly join forces after a shake, then quietly drift apart. That separation isn’t personal. It’s physics.
People don’t “not mix” because they’re difficult. Often they come with different rhythms, histories, ways of communicating, and incentives. Those differences make them behave like oil and water: compatible in purpose, but resistant by nature.
The secret ingredient: the “mustard role”
Every long lasting emulsion has something that helps it stay together.

In salad dressing, it might be the mustard.
In chocolate ganache, it’s the cocoa solids.
In ice cream, it’s proteins and stabilizers.
These play the role of being emulsifiers.
Emulsifiers always have two faces: one side that likes water and one that likes oil. The job of an emulsifier is humble and practical: it helps things stay together that would otherwise separate.
In life, it’s sometimes something that’s shared that plays this role. For example, we blend better when there’s:
- A shared habit
- A shared sense of humour
- A shared experience
- A shared value
Like just adding a dab of mustard and everything just blends better.
Other times, people play the role of the emulsifier. These people are not usually loud or dramatic (although this is still possible). They’re typically the person who translates language, who asks the right gentle question, who makes a practical suggestion that suddenly helps two approaches land together. They’re the “mustard” of a group — quietly connective, and surprisingly powerful.
Method matters more than ingredients
Food science is stubborn about this: how you introduce ingredients often matters as much as what you introduce.

Dump cream into melted chocolate too fast and ganache splits.
Add oil too quickly and your vinaigrette refuses to emulsify.
Coconut milk naturally separates into layers when chilled (fat rising, water sinking); warm it gently and it recombines.
The environment decides much of the texture.
People are the same. Timing, pace, tone, and order matter. Two people with great intentions can “break” a conversation if it’s rushed or badly framed. The same ingredients — empathy, skill, good intent — produce different textures depending on method.
Environment changes everything
Even a perfectly made emulsion can separate if the conditions change: temperature shifts, acidity, or prolonged storage destabilize it. Relationships and groups respond to environment in the same way. Stress, leadership changes, distance, or shifting priorities can make formerly close teams drift apart. It’s rarely a simple personal failure. It’s often a change in context.
And in the same way, reconnecting often isn’t about adding just effort. It’s about adjusting the environment so blending becomes easier again.
Some combinations will always need a little maintenance
Scientists accept that some emulsions separate over time and need a quick shake before use (think homemade dressing), or gentle warming (think coconut milk in a curry).
That’s not a flaw. It’s natural.

People and relationships are similar. Some friendships need regular check-ins. Some collaborations need a bridge person. Some bonds require small rituals to stay functional. Maintenance isn’t a sign of weakness; it’s the practical work of keeping a mixture stable.
Takeaway
The lesson from the kitchen is simple. And you don’t need to be a scientist to understand: people aren’t problems to be fixed. They’re systems to be understood.
- Some blends happen naturally.
- Some need a gentle “mustard” connector like friend or dab of something shared.
- Some require careful method and steady conditions.
- And a few will always benefit from a quick stir now and then.
What kitchen combination reminds you of a relationship that learned to hold together?
Perhaps a dressing that suddenly worked, a ganache that set beautifully, or a mayonnaise that held its texture? I’d love to hear.









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