Our scoring model is built on peer-reviewed sexual health research, clinical sexology, and large-scale survey data. Algorithms differ by technique β because the evidence base is different for each.
Orbiting & circular patterns 24%
The OMGYes study (N=1,055 U.S. women) identified circular, side-to-side, and up-down tongue motion on the clitoral glans as the single most consistently reported pathway to orgasm. Herbenick et al. (2018) confirmed orbital patterns in a U.S. probability sample. We score lateral tongue asymmetry via mouthLeft/mouthRight blendshape differential.
Herbenick et al. (2018) "Women's Experiences With Genital Touching, Sexual Pleasure, and Orgasm" β J. Sex & Marital Therapy, 44(2), 201β212
OMGYes / Indiana U. School of Public Health (2017) β N=1,055 probability sample
Shirazi et al. (2018) "Clitorally Stimulated Orgasms" β J. Sexual Medicine, 15(5), 726β736
Rhythm consistency 18%
Consistent stimulation rhythm is the most cited determinant of orgasm in qualitative clinical data. Kerner (2004) argues that breaking rhythm is the #1 error in cunnilingus. We compute the coefficient of variation (CV) of oscillation cadence β optimal CV 0.15β0.40 scores highest; overly erratic or robotically static both score lower.
Kerner, I. (2004) She Comes First: The Thinking Man's Guide to Pleasuring a Woman β HarperCollins, Ch. 9β14
Herbenick et al. (2018) β location consistency rated top predictor of orgasm
Kontula & Miettinen (2016) "Determinants of female sexual orgasms" β Socioaffective Neuroscience & Psychology, 6
Lip suction / "the kiss" 14%
Rhythmic lip suction enclosing the clitoral glans is documented across clinical sexology literature as a high-efficacy technique. Kerner describes "the kiss" as a core sequence. Mah & Binik (2001) note suction-pulsing as a distinct arousal pathway. Detected via mouthPucker + mouthFunnel blendshapes above threshold.
Kerner, I. (2004) She Comes First β "The Tongue Bath," Ch. 12β15
Mah, K. & Binik, Y.M. (2001) "The nature of human orgasm" β Clinical Psychology Review, 21(6), 823β856
Komisaruk, B. et al. (2006) The Science of Orgasm β Johns Hopkins University Press
Pressure variation 8%
Herbenick's 2018 probability sample found that most women prefer pressure that varies rather than constant light or constant firm. Dynamic range of jaw + lip engagement is used as a pressure proxy. Both extremes (no pressure, unvarying pressure) score lower than varied engagement.
Herbenick et al. (2018) β varied pressure rated highest in preference; N=1,055
Frederick et al. (2018) "Differences in Orgasm Frequency" β Archives of Sexual Behavior, 47(1), 273β288
Tongue work & tip focus 10%
Focused tongue-tip contact on the clitoral glans is distinct from broad-tongue strokes in outcome data. OMGYes found 66% of women prefer focused tip stimulation over broad contact. Scored via tongueOut blendshape combined with mouthShrugLower lip retraction indicating pointed tongue engagement.
OMGYes (2017) β focused tip technique vs. broad contact preference breakdown
Dodson, B. (2002) Orgasms for Two β Harmony Books (clitoral anatomy & focused technique)
Building intensity 6%
Gradual arousal escalation was rated the #1 technique factor in Herbenick's 2018 open-ended importance responses. Activity in the latter half vs. opening third of session is compared. Steady increase scores highest; fading intensity or flat effort throughout scores lower.
Herbenick et al. (2018) β arousal-building time ranked #1 in importance responses
Bischof-Campbell et al. (2019) "Body Movement Is Associated With Orgasm" β J. Sex Research, 56(3), 356β366
Stroke rhythm 26%
Consistent rhythmic jaw movement (mimicking stroke cadence) is identified as the primary arousal-building mechanism in fellatio. Joannides (2017) identifies rhythm as the single most important technical variable. We compute CV of jaw-open oscillation β too irregular or too mechanical both score lower; optimal cadence 0.5β1.5 Hz range.
Joannides, P. (2017) Guide to Getting It On, 9th ed. β Goofy Foot Press (Ch. 21β23, fellatio technique)
Westheimer, R.K. (2011) Dr. Ruth's Sex After 50 β Quill Driver Books (rhythm as primary factor)
Yang, C.C. et al. (2007) "Male sexual function" β Int'l J. Impotence Research, 19(4)
Lip seal & control 20%
Maintained lip contact throughout stroke creates consistent pressure and sensation. Joannides and clinical texts identify lip seal as a key differentiator between novice and skilled technique. We score mouthRollLower + mouthRollUpper (lip-over-teeth wrapping) combined with mouthPucker tension as a lip-seal composite.
Joannides, P. (2017) Guide to Getting It On β lip seal chapters
Kerner, I. (2009) He Comes Next β HarperCollins (lip pressure & consistency)
Tongue on frenulum 18%
The frenulum (underside of glans-shaft junction) contains the highest density of nerve endings in penile anatomy. Schober et al. (2009) measured sensitivity distribution and identified the frenulum as the most erotically sensitive region. Tongue extension and lateral movement during jaw engagement is scored via tongueOut Γ mouthLeft/Right composite.
Schober, J. et al. (2009) "Self-assessment of genital anatomy, sexual sensitivity and function" β BJU International, 104(2), 175β182
Yang, C.C. et al. (2007) "Functional neuroanatomy of the penis" β Int'l J. Impotence Research
Joannides, P. (2017) β frenulum stimulation as "ace in the hole" technique
Suction engagement 12%
Inward cheek pressure and mouthFunnel-type suction create negative pressure that amplifies sensation. Clinical guides consistently identify suction as a secondary but high-impact technique when combined with stroke rhythm. Scored via mouthFunnel + mouthPucker blendshapes during active jaw engagement phases.
Joannides, P. (2017) Guide to Getting It On β suction technique section
Kerner, I. (2009) He Comes Next β suction combined with lip seal
Depth & head focus 8%
Glans focus (concentrating on the coronal ridge and glans rather than deep-throat mechanics) is preferred in most sexual health surveys. Westheimer (2011) and Joannides (2017) both note that glans stimulation is more pleasurable than depth for most recipients. Scored via jaw-open amplitude and tongue protrusion during engagement.
Westheimer, R.K. (2011) Dr. Ruth's Sex After 50 β glans sensitivity notes
Joannides, P. (2017) β glans focus vs. depth preference data
Building intensity 8%
As with cunnilingus, escalating intensity over the session arc outperforms flat or declining effort. Joannides documents that varying pace and pressure to build toward climax is a key differentiator. Second-half session activity is compared to first-half to score build trajectory.
Joannides, P. (2017) Guide to Getting It On β pacing and escalation chapter
Bischof-Campbell et al. (2019) "Body Movement Is Associated With Orgasm" β J. Sex Research, 56(3)
Scoring uses Google MediaPipe FaceLandmarker (468 facial landmarks + 52 blendshape coefficients) running entirely in your browser via WebAssembly. No video, image, or biometric data ever leaves your device.