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1. People are more likely to tilt their heads to the right when kissing instead of the left (65 percent of people go to the right!). 人们在接吻的时候更喜欢把头歪向右边而非左边（65%的人都向右边！） 2. The oldest known love song was written 4,000 years ago and comes from an area between the Tigris and Euphrates Rivers. 最古老的情歌诞生于4000多年前、底格里斯河与幼发拉底河之间的两河流域。（记得周董的《爱在西元前》吗……） 3.One in five long-term love relationships began with one or both partners being involved with others. 在关系持久的恋人中，五分之一的人一方或双方在进入这段恋情之初是作为第三者。 4. Falling in love can induce a calming effect on the body and mind and raises levels of nerve growth factor for about a year, which helps to restore the nervous system and improves the lover’s memory. 当你坠入爱河时，你的身体和精神都会产生一种镇定作用，神经生长因子值也会上升，从而你的神经系统将得以改善，记忆力也会增强。 5. Love can also exert the same stress on your body as deep fear. You see the same physiological responses—pupil dilation, sweaty palms, and increased heart rate. 爱情会让你体验到一种与深度恐惧一样的压迫感。你会产生与恐惧一样的生理学反应——瞳孔放大、手掌出汗、心跳加速。 | 
