When leaning toward a partner for a kiss, the direction that individuals turn their head when planting the kiss is found to vary based on the kiss’s context; romantic kissing between adult couples is consistently directed rightward, though recently, a non-romantic kiss between parent–child couples was observed to be leftward. The current study further examines the lateral head-turning direction between non-romantic couples using a novel context: a first kiss between strangers. Observing strangers kissing was feasible due to a unique social media phenomenon; since 2014, 23 “First Kiss” online videos have emerged which depict kisses facilitated by the video’s director between consenting strangers. The turning direction of 230 kissing couples were coded from the 23 First Kiss videos, and the proportion of right to left turns were almost equal; 51% of couples displayed a right-turn kiss, and 49% conveyed a left-turn kiss. Further, the proportion of right and left turns observed from our sample of strangers kissing were compared to Güntürkün’s (in Nature 421:711, https://doi.org/10.1038/421711a, 2003) original study that examined authentic kissing between adult couples. A significantly different turning bias was exhibited. Because the kissing criterion was parallel between these studies, our study demonstrates that the context influenced the direction of bias, namely, that of a non-romantic kiss. We discuss the potential role of context and emotional lateralization on kissing laterality, and propose future directions to test these predictions.

中文翻译：

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接吻对吗？陌生人初次接吻时没有向右转弯的偏见

当向伴侣倾斜以进行亲吻时，发现个人在种植亲吻时转头的方向根据亲吻的上下文而有所不同。成年夫妻之间的浪漫之吻一直指向右，尽管最近，观察到亲子夫妻之间的非浪漫之吻向左。当前的研究还使用一种新颖的语境：陌生人之间的初吻，进一步研究了非浪漫情侣之间的横向头转方向。由于独特的社交媒体现象，观察陌生人的接吻是可行的。自2014年以来，出现了23个“ First Kiss”在线视频，这些视频描述了视频导演在同意的陌生人之间促成的亲吻。从23个初吻中记录了230对接吻的转身方向视频，左右转弯的比例几乎相等；51％的夫妻表现出右转之吻，而49％的夫妻表现出左转之吻。此外，将我们从陌生人接吻样本中观察到的左右转弯的比例与Güntürkün（在《自然》 421：711，https：//doi.org/10.1038/421711a，2003年）中进行的原始研究进行了比较，该研究研究了成年夫妻之间的真实接吻。表现出明显不同的转向偏差。因为接吻的标准在这些研究之间是平行的，所以我们的研究表明情境会影响偏向的方向，即非浪漫的接吻的方向。我们讨论了上下文和情绪偏侧化对接吻偏侧性的潜在作用，并提出了未来的方向来测试这些预测。