Age bands
The 20s hold the behavioral high — more partnered sex, more women masturbating in a given month. The 30s hold the hunger high — more thoughts, denser fantasies, more reliable orgasm, more events rated as enjoyable. Both statements can be true.
Each spoke scaled 0–100 against a fixed cap so different units can sit on one shape.
| Measure | 18–30 | 30–40 | What moves | Evidence |
|---|---|---|---|---|
| Think about sex | 10 /day 3–18 | 12 /day 4–20 | Higher in the 30s | High confidence |
| Want sex | 4.2 /week 1–10 | 4.8 /week 1–11 | Higher in the 30s | Moderate |
| Fantasize about sex | 1.7 /day 0.3–5 | 2.6 /day 0.5–7 | Higher in the 30s | Moderate |
| Enjoy sex | 74 % of events 62–86 | 81 % of events 70–90 | Higher in the 30s | Moderate |
| Orgasm during sex | 62 % of events 45–75 | 68 % of events 50–82 | Higher in the 30s | High confidence |
| Masturbate | 3.4 /month 0–12 | 2.8 /month 0–10 | Higher in the 20s | High confidence |
Highest partnered-sex prevalence in national surveys. Daily sexual thoughts around 10. Masturbation past-month prevalence peaks at 25–29.
Thoughts
10/day
Range 3–18 · Women 18–30
Fisher 2011 college women averaged ~10 sexual thoughts/day on a tally counter (men ~19). Individual range is enormous; erotophilia predicts counts better than age. Social-desirability bias systematically suppresses women's reports.
Desire
4.2/week
Range 1–10 · Women 18–30
A synthesis of Natsal frequency, NSSHB partnered-sex prevalence (highest at 20–29), and desire-discrepancy studies. Many women this age describe responsive rather than spontaneous desire, so 'want' undercounts arousal that appears after initiation.
Fantasies
1.7/day
Range 0.3–5 · Women 18–30
Elaborated scenes, not fleeting thoughts. Leitenberg & Henning: 90–97% of women report fantasies. Easton 2010 found 18–26-year-olds fantasize less often and less intensely than 27–45.
Enjoyment
74% of events
Range 62–86 · Women 18–30
pleasurable last event: 74%
Most partnered events are rated pleasurable in NSSHB event-level data. Enjoyment is high even when orgasm does not occur — pleasure ≠ climax.
Orgasm
62% of events
Range 45–75 · Women 18–30
always orgasm: 30%
NSSHB: 64% of women orgasmed at the most recent sexual event. Frederick 2018: heterosexual women orgasm ~65% of the time; lesbian women ~86%. YouGov UK: only 30% 'always.' Repertoire (clitoral stimulation, oral sex, duration) moves this number more than age.
Masturbation
3.4/month
Range 0–12 · Women 18–30
any in past month: 48%
NSSHB past-month prevalence: 26% (18–19), 44% (20–24), 52% (25–29). Population mean is pulled down by women who did not masturbate that month. Among those who did, a few times a month is the mode; weekly is common in the mid-20s.