The researcher watched kissing couples in airports, railroad stations, beaches and kissing couples in airports, railroad stations, beaches and parks. He estimated their ages at around 13 to around 70.

昆图尔肯在机场、火车站、沙滩以及公园里观察情侣们亲吻，他估计这些人的年龄在13岁到70岁之间。

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Frequent kissing in committed couples has been found to reduce stress and cholesterol while increasing a more satisfying relationship.

科学发现一对男女之间频繁的亲吻能缓解压力降低胆固醇，同时也能使得双方的关系更上一层楼。

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Kissing also made the couples' hearts pound, but not for as long.

亲吻也能使心跳更有力，但持续的时间没那么长。

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His blurry shots from the early 1980s taken off the television screen couples kissing and Superman flying are among the pleasant surprises here.

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Public displays of affection are frowned upon in mainstream society, so at midnight, the only fireworks were in the sky: there was no kissing even among couples.

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The kissing was brief and involved gay couples and heterosexual couples.

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