The Chemistry vs. Compatibility Model
Diagnose whether your sex life problem is attraction or fit, because the two need different fixes.
- Difficulty
- Easy
- Time to result
- ~months to results
- Steps
- 6
- Confidence
- 82%
Dr. Tara's model splits sexual satisfaction into two distinct, non-interchangeable ingredients. Chemistry is the immediate, largely involuntary attraction you feel toward someone: you meet them and instantly sense whether you'd want them in bed. It's fixed and doesn't grow with effort. Compatibility is whether you and a partner actually enjoy similar things sexually: touch, positions, kink level, pace, and exploration. Unlike chemistry, compatibility can be built, but it takes real time, sometimes years, and requires deliberate conversation about preferences. Her framework argues you need both for an amazing sex life, and communication layered on top to sustain it. The mechanism gives people a diagnostic vocabulary: instead of vaguely knowing something is 'off,' they can pinpoint whether the gap is attraction-based or preference-based, which changes what kind of work (or acceptance) is required.
Origin
Developed from Dr. Tara's own first marriage, which she says had neither chemistry nor compatibility, contrasted with her current marriage, which has both. She built the concept while teaching relational and sexual communication at the university level.
Core principles
- 01Good sex requires two separate components: chemistry (attraction) and compatibility (shared preferences).
- 02Chemistry is binary and largely fixed; you either feel the pull or you don't.
- 03Compatibility can be built and grown over time through communication and exploration.
- 04You cannot substitute one for the other long-term; both are needed for a fulfilling sex life.
- 05Auditing past and present relationships against both factors reveals why a relationship did or didn't work sexually.
How to run it
- 1
Test for chemistry first
Notice whether you feel an immediate, involuntary attraction to the person, independent of how well you get along.
Pro tip Chemistry shows up fast; if you're still waiting for it after months, it likely isn't coming.
- 2
Separate compatibility from chemistry
Once chemistry is confirmed, evaluate whether you and your partner enjoy similar sexual activities, pace, and exploration level.
Watch out Don't confuse getting along generally with being sexually compatible; they're different questions.
- 3
Audit past and current relationships
Score each relationship against both factors to understand what actually made a sex life work or fail.
- 4
Accept that chemistry doesn't grow
If chemistry is absent, don't invest years hoping it develops; per Dr. Tara, it's either there or it isn't.
Watch out This is her explicitly stated controversial opinion, not a universal consensus among sex therapists.
- 5
Build compatibility deliberately
If chemistry exists but compatibility is low, work through structured conversations about preferences over an extended timeframe.
Pro tip Expect this to take anywhere from 6 months to 10 years depending on how much either partner has explored their own preferences already.
- 6
Maintain with ongoing communication
Even with both chemistry and compatibility present, sustain the sex life with regular sexual communication rather than assuming it runs on autopilot.
In the wild
Dr. Tara married her first husband in her 20s partly due to cultural pressure in Thailand to marry before 30. She later realized the marriage lacked both chemistry and sexual compatibility, despite her academic expertise in relational communication.
→ The marriage ended in divorce after she recognized she was 'talking the talk' professionally but not living it personally.
In her current marriage, Dr. Tara reports having both chemistry and compatibility with her husband, which she credits as the foundation for a sex life she previously didn't believe was possible for her.
→ A relationship she describes as having 'an amazing sex life' once both ingredients were in place.
Common mistakes
Marrying for compatibility alone
Choosing a partner based on shared values or life goals while ignoring the absence of physical/sexual chemistry, assuming it will develop later.
Never actually auditing preferences
Assuming you're sexually compatible with a partner without ever explicitly discussing preferences, which leaves incompatibility undiscovered for years.
Treating both as fixed
Giving up on compatibility too early by treating it like chemistry, when compatibility is the one factor that can genuinely improve with communication and time.
Is it for you?
Best for
Anyone evaluating a current relationship's sexual health or trying to understand why a past relationship's sex life failed.
Not ideal for
People looking for a quick technique to fix sex tonight rather than a diagnostic lens on the relationship itself.
From the transcript
“So when we think of people that have good sex together, they need two components. They need chemistry and compatibility.”
“I disagree. I think that's my controversial opinion is chemistry part. It's either you have it or you don't.”
“I think it can be anywhere from 6 months to I would say 10 years.”
From the episode
#308 Dr. Tara Suwinyattichaiporn - TikTok's #1 Sex Educator on Why Relationships Are Failing