Sexual Interest by Age and Gender

The results of the personality test item “I am very sexual” (0 = not very sexual, 6 = very sexual) answered by 142k test takers show several consistent patterns across age and depression status. First, sexual interest rises from early adolescence into the 20s for both males and females. Among males, interest remains elevated through the 30s and appears to peak again in midlife before gradually declining. Females show a more moderate rise into early adulthood, with a flatter trajectory overall and a more pronounced decline after midlife. These patterns suggest that self-perceived sexual interest is not linear across the lifespan, but instead follows a developmental curve with midlife stabilization or secondary peaks in some groups.

The mid-30s to early-40s elevation in male sexual interest is broadly consistent with large population research suggesting that male sexual desire does not simply decline steadily after youth, but can remain high or even peak in midlife (Nature Scientific Reports study). Other large-scale analyses have similarly found nonlinear age effects in sexual desire, rather than a uniform decline across adulthood (PMC study on age and sexual desire). In this sense, the present findings align with the growing evidence that midlife male desire may be more robust than commonly assumed.

One notable pattern in the data is that younger depressed males and females report slightly higher sexual self-ratings compared to their non-depressed counterparts, with this pattern reversing after approximately age 35. The literature offers partial support for this age-dependent shift. Among adolescents and young adults, depressive symptoms have been linked with increased sexual risk behavior and greater sexual activity in some contexts (PMC study on depression and adolescent sexual behavior). However, in adult populations, depression is more consistently associated with reduced sexual desire and sexual dysfunction (PMC review on depression and sexual dysfunction). Additionally, antidepressant use—particularly SSRIs—is well documented to reduce libido and sexual functioning (PMC review on antidepressants and sexual side effects). If antidepressant exposure increases with age or depression severity, this could help explain the post-35 reversal observed in the present chart.

The early-50s elevation observed in some subgroups is less clearly supported in the broader literature. While some midlife stability or resilience in desire has been documented, most population-level studies show either plateauing or gradual decline rather than a distinct secondary peak in later adulthood. This suggests that the early-50s increase in the present dataset may reflect cohort composition, relationship status differences, or selective sampling rather than a universal biological effect.

Overall, the findings largely align with published evidence showing nonlinear age trajectories in sexual desire, stronger midlife persistence among males, and age-dependent differences in how depression relates to sexual interest. Where the data diverges—particularly regarding later-life peaks—the differences may reflect sample composition, measurement differences (self-concept versus frequency or physiological function), or medication effects.