Dynamic Statistical Distribution Curve (At Age 25)
25th–75th Percentile Envelope
Current Age Median
Cohort Trajectory & Lifetime Progression (Age 18–80+)
Model Trajectory
Empirical Mean
| Age Bracket | Annual Frequency Range | Est. Weekly Average | Normative Characteristics |
|---|---|---|---|
| 18–29 years | 80–112 times / year | 1.85 / week | Peak activity cohort, high variance across relationship status |
| 30–39 years | 70–86 times / year | 1.50 / week | Stable high frequency, slight adjustment for career/family setup |
| 40–49 years | 60–70 times / year | 1.25 / week | Consistent routine plateau, moderate long-term partnership variance |
| 50–59 years | 40–52 times / year | 0.88 / week | Declining baseline (~once per week or slightly less) |
| 60+ years | 20–35 times / year | 0.53 / week | Gradual taper, sustained intimacy among healthy cohabitating cohorts |