A waitress's lipstick or lack of it appeared to make no difference in how female patrons tipped。 无论女服务员涂什么颜色的口红，或者有没有涂口红，对女顾客来说都没有影响。

Previous research showed men gave more tips to female waitresses wearing full facial makeup, but until now no study has looked at the effect of lip color alone, the researchers wrote online April 17 in the International Journal of Hospitality Management。 之前有过调查发现，男顾客更愿意给化妆了的女招待小费。但是还没有人专门对口红颜色所产生的效果做过实验。研究者把这一结果写在了4月17日的电子版《国际接待业管理》杂志上。

The "red effect" has shown up elsewhere. In prior research, women photographed against a red background were rated as more sexually attractive by men, but not by other women. Men found women in red clothes more attractive and even sat closer to a woman in a red shirt versus a blue one。 “红色效应”并不鲜见。在早期的研究中发现，女性以红色背景拍照对男性更具吸引力。男性觉得穿红色衣服的女性更具魅力。比起穿蓝色衬衣的女性，穿红色衬衣的女性让男性更愿意接近。

Crimson isn't just for the ladies, as research published in 2010 found that women from the United States, Germany and China found men wearing red to be more attractive and desirable than guys clad in other colors。 红色效应不仅适用于女性，男性也有相似的效果。在2010年发表的一项调查显示，美国、德国和中国的女性都对红衣男子更为青睐。

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