The 3+1 Relationship Model
Assess three compatibilities plus the circumstances that let them work
- Difficulty
- Moderate
- Time to result
- ~months to results
- Steps
- 6
- Confidence
- 99%
Sinek's named 3+1 model says a great relationship rests on three forms of compatibility plus enabling circumstances. Intellectual compatibility means both people can teach, learn, and stimulate one another. Emotional compatibility means they can be vulnerable, hold space, and grow together. Sexual compatibility, which Sinek links with creativity, is distinct from merely judging physical appearance. The “plus one” covers timing, location, availability, and other circumstances that can make a strong match unworkable. All three compatibilities need not be equally high at every moment; when one dips, the others can sustain the relationship. The model is reciprocal: it is not enough to find a partner who meets the three dimensions—you must also offer those dimensions to them.
Origin
Extracted from The Diary of a CEO
Core principles
- 01Great relationships need intellectual compatibility
- 02Great relationships need emotional compatibility
- 03Great relationships need sexual and creative compatibility
- 04The three dimensions fluctuate and support one another
- 05Timing and location can block an otherwise strong match
- 06Compatibility must be mutual
How to run it
- 1
Check intellectual fit
Ask whether curiosity, conversation, teaching, and learning flow in both directions. Agreement on every topic is not required.
Pro tip Look for genuine interest in each other's different worlds.
Watch out Shared interests alone do not prove intellectual compatibility.
- 2
Check emotional fit
Assess whether both people can disclose difficult states, listen, hold space, and take responsibility for growth.
Pro tip Notice how each person responds when the other is having a bad day.
- 3
Check sexual and creative fit
Distinguish lived chemistry and creative connection from a visual checklist. Evaluate this as a mutual dimension.
Watch out Do not infer the other person's attraction without communication.
- 4
Reverse the assessment
Ask whether you provide intellectual, emotional, and sexual or creative compatibility to the other person. Treat the model as reciprocal rather than a shopping list.
Pro tip Use behavior, not self-image, as evidence.
- 5
Test circumstances
Check whether timing, geography, availability, and life direction allow the relationship to exist in practice.
Pro tip Separate a compatibility problem from a circumstance problem.
Watch out Strong compatibility does not erase an unavailable or unsafe situation.
- 6
Review fluctuations
When one dimension is low, assess whether the other two sustain connection and whether the dip is temporary. Avoid declaring the entire relationship broken from one moment.
Watch out A permanently absent dimension is different from a normal fluctuation.
In the wild
Sinek describes meeting people who appeared compatible across the three dimensions but were happily married or lived on the other side of the world with neither person willing to move.
→ The model separates a meaningful connection from a relationship that circumstances do not permit.
The host says his partner appears to meet his three priorities. Sinek reverses the lens: if the host hides every bad day, he may not be emotionally available enough to offer all three back to her.
→ Compatibility becomes a mutual practice rather than a one-sided selection scorecard.
Common mistakes
Scoring only the other person
The model fails when used as a consumer checklist without examining what you offer in return.
Confusing appearance with chemistry
The speakers explicitly distinguish physical attractiveness from experienced sexual compatibility.
Ignoring circumstances
Three forms of compatibility cannot by themselves solve incompatible timing, geography, or availability.
Is it for you?
Best for
Adults evaluating whether a dating relationship has the foundations and circumstances for long-term depth.
Not ideal for
It is not a scientific diagnostic, a guarantee of success, or a reason to override consent, safety, or personal deal breakers.
From the transcript
“I think great relationships are based on what I call 3+1.”
“The plus one is circumstances.”
“We have to have the three for them, too.”
From the episode
Simon Sinek: Opens Up About His Struggle with Loneliness, Love, Dating!