虚拟现实色情对捐精者精液质量的影响：一项平衡和随机对照的within-subjects 交叉试验。
Effects of virtual reality erotica on ejaculate quality of sperm donors: a balanced and randomized controlled cross-over within-subjects trial.
机构信息
Cryos International Sperm and Egg bank, Vesterbro Torv 3, 8000, Aarhus C, Denmark.
Department of Oncology and Metabolism, The Jessop Wing, University of Sheffield, Level 4, Tree Root Walk, S10 2SF, Sheffield, UK.
出版信息
Reprod Biol Endocrinol. 2022 Oct 11;20(1):149. doi: 10.1186/s12958-022-01021-1.
BACKGROUND
Previous research has shown that the type and duration of erotic material that men have access to during masturbation can influence semen parameters. To our knowledge, the use of virtual reality (VR) headsets to present erotica has not previously been studied. We reasoned that, because VR can provide a more immersive experience to the user, semen parameters of masturbatory ejaculates may be altered.
METHODS
This study had a balanced and randomized controlled cross-over within-subjects design. 504 ejaculates were collected from 63 sperm donors at 4 locations in Denmark. During masturbation each donor was instructed to observe erotic material either on a touch screen monitor or using a VR headset. The order of each pair of within-subject treatments was randomized by the throw of a dice. Anonymized data were analysed with linear mixed and piecewise structural equation models.
RESULTS
Both abstinence period and VR-use influenced the total number of motile spermatozoa ejaculated. For short abstinence periods, VR-use increased the number of motile sperm in the ejaculate. However, the difference between VR and non-VR ejaculates decreased as abstinence period increased such that there was no difference at the mean abstinence period of 58 h. For longer abstinence periods, total motile sperm counts were lower, on average, when men used VR compared to those that did not.
CONCLUSION
The use of VR headsets to view erotica had a strong positive effect on the number of motile sperm in an ejaculate when the donor's abstinence time was short (< 24 h). VR-use could improve the ejaculate quality of men who are asked to provide samples after a short period of abstinence, such as men in infertile partnerships producing samples for ART or cancer patients depositing sperm before treatment.
TRIAL REGISTRATION
Trial retrospectively registered on 13 July 2022 at ClinicalTrials.gov. Identifier: NCT05457764.
背景
先前的研究表明，男性在自慰时接触的色情材料的类型和时长会影响精液参数。据我们所知，虚拟现实（VR）头显在呈现色情内容方面尚未得到研究。我们推断，由于 VR 可以为用户提供更身临其境的体验，因此自慰射出精液的参数可能会发生变化。
方法
这项研究采用平衡随机交叉自身对照设计。在丹麦的 4 个地点，从 63 名精子供体中采集了 504 次射精。在自慰过程中，每位供体被指示通过触摸屏幕监视器或使用 VR 头显观察色情材料。每对内部治疗的顺序由掷骰子随机决定。使用线性混合和分段结构方程模型对匿名数据进行分析。
结果
禁欲期和 VR 使用均影响射出的总可运动精子数。对于较短的禁欲期，VR 使用会增加射出精液中的可运动精子数。然而，随着禁欲期的增加，VR 和非 VR 射出物之间的差异减小，以至于在平均禁欲期 58 小时时没有差异。对于较长的禁欲期，与未使用 VR 的男性相比，使用 VR 的男性射出的总可运动精子计数平均较低。
结论
当供体的禁欲时间较短（<24 小时）时，使用 VR 头显观看色情内容对射出精液中的可运动精子数量有强烈的积极影响。VR 可以改善在短禁欲期后被要求提供样本的男性的精液质量，例如在不孕伴侣中产生样本进行辅助生殖技术（ART）或癌症患者在治疗前储存精子的男性。
试验注册
试验于 2022 年 7 月 13 日在 ClinicalTrials.gov 上进行了回顾性注册。标识符：NCT05457764。
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