從青春期晚期至中年期的自慰行為軌跡：一項基於人群的縱向研究 Masturbation Trajectories from Late Adolescence into Mid-Adulthood: A Population-Based Longitudinal Study ——《性研究雜誌》第63卷第4期，2026年5月—— <The Journal of Sex Research>, Volume 63, Issue 4, May 2026 【摘要】自慰行為（俗稱：手淫）具有諸多健康益處，是大多數人性生活不可或缺的一部分，且通常貫穿於人生的各個階段。然而，目前尚缺乏探討自慰頻率在人生主要階段如何變化的縱向研究。本研究利用多層增長曲線模型，基於一個包含2562名個體的縱向人群樣本，考察了19至50歲人群自慰頻率的發展軌跡。對於女性而言，自慰頻率呈逐漸上升趨勢，直至30歲出頭達到峰值，隨後略有下降。相比之下，男性的自慰行為在所考察的年齡跨度內基本保持穩定。在控制了伴侶性行為頻率這一變量後，兩性的自慰軌跡均未發生改變。然而，若將伴侶關係狀況及性幻想頻率納入考量，男性的自慰軌跡會發生變化，而女性的軌跡則不受影響。與已為人父母者相比，終身未育者在30歲左右之前表現出自慰頻率更大幅度的增長，隨後也呈現出更顯著的下降趨勢。在所有年齡段中，具有非異性戀性身份的參與者其自慰頻率均高於嚴格意義上的異性戀者。此外，自慰軌跡在不同宗教信仰和受教育程度的人群之間未呈現出顯著差異。綜合來看，這些研究結果表明：作為一種性活動，自慰在頻率上具有相對於伴侶性行為的獨立自主性；同時也突顯了個體的生活境遇及性特質在塑造其成年期自慰行為表現方面所發揮的重要作用。未來的研究應進一步深入探討伴侶性行為、性功能及親密關係問題，以及自慰行為之間相互作用的動態機制。 [Abstract] Masturbation with its numerous health benefits is an integral aspect of most people’s sexuality and is typically observed across all stages of life. However, longitudinal studies exploring the frequencies of masturbation across major life phases are lacking. We examined the development of masturbation frequencies from ages 19–50 via multilevel growth curve modeling with a longitudinal population-based sample of 2,562 individuals. For women, masturbation frequency gradually increased until they were in their early 30s, followed by a slight decline. In contrast, men’s masturbation practices remained largely stable across the investigated age span. Masturbation trajectories did not change for either gender when controlling for the frequency of partnered sex. However, accounting for partnership status and the frequency of sexual fantasizing changed the trajectories for men, but not for women. Compared to those who became parents, individuals who remained childless presented a greater increase in masturbation frequency until approximately age 30, followed by a greater subsequent decline. Participants with nonheterosexual sexual identity masturbated more frequently than did strictly heterosexual individuals, across all ages. Masturbation trajectories did not differ significantly across religious affiliation and educational attainment. Collectively, these findings suggest the autonomous nature of masturbation as a sexual activity in relation to the frequency of partnered sex but also underscore the importance of individual life circumstances and one’s sexuality in shaping its expression throughout adulthood. Future research should further investigate the dynamics among partnered sexual practices, sexual and relational problems, and masturbation. 論文原文：Anna Ivanova, Sam Fluit, Nantje Fischer, et al. (2026). Masturbation Trajectories from Late Adolescence into Mid-Adulthood: A Population-Based Longitudinal Study. The Journal of Sex Research, Volume 63, Issue 4, Pages 510-524. May 2026. https://doi.org/10.1080/00224499.2025.2489091 （翻譯兼責任編輯：MARY） （需要英文原文的朋友，請聯繫微信：millerdeng95或iacmsp）
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